diff --git a/app/src/main/resources/biweekly/biweekly.properties b/app/src/main/resources/biweekly/biweekly.properties
deleted file mode 100644
index ef804973d6..0000000000
--- a/app/src/main/resources/biweekly/biweekly.properties
+++ /dev/null
@@ -1,4 +0,0 @@
-version=0.6.8-SNAPSHOT
-groupId=net.sf.biweekly
-artifactId=biweekly
-url=http://github.com/mangstadt/biweekly
diff --git a/app/src/main/resources/biweekly/messages.properties b/app/src/main/resources/biweekly/messages.properties
deleted file mode 100644
index 50c0ff8a0c..0000000000
--- a/app/src/main/resources/biweekly/messages.properties
+++ /dev/null
@@ -1,259 +0,0 @@
-#==============================================================================
-#== VALIDATION WARNINGS =======================================================
-#==============================================================================
-
-#parameter warnings
-validate.1={0} parameter value "{1}" is non-standard.  Standard values are: {2}
-validate.47={0} parameter value "{1}" is deprecated in the latest iCalendar specification.
-validate.53={0} parameter value ("{1}") contains one or more invalid characters.  Parameter values may contain printable characters, with the exception of: {2}
-validate.58={0} parameter value ("{1}") contains one or more invalid characters.  Parameter values may contain printable, 7-bit ASCII characters, with the exception of: {2}
-validate.54={0} parameter contains one or more invalid characters in its name.  Parameter names may contain letters (A-Z), numbers (0-9), and dashes (-).
-validate.57={0} parameter contains one or more invalid characters in its name.  Parameter names may contain printable, 7-bit ASCII characters, with the exception of: {1}
-
-#generic cardinality
-validate.2=A {0} property is required for this component.
-validate.3=There cannot be more than one instance of the {0} property.
-validate.45=iCalendar version {0} does not support this property.
-validate.48=iCalendar version {0} does not support this component.
-
-#ICalendar
-validate.4=An iCalendar object must have at least one component.
-validate.44=iCalendar version 2.0 does not support having a GEO property in this location.
-validate.55=Multiple {0} properties can only exist if they have different LANGUAGE parameter values.
-
-#Observance, VEvent, VJournal, VTodo
-validate.5=The BYHOUR, BYMINUTE, and BYSECOND rule parts cannot be specified in the RecurrenceRule property when the DateStart property contains a date value (as opposed to a date-time value).
-validate.6=There should be only one instance of the RecurrenceRule property.
-
-#VAlarm
-validate.7=Audio alarms should have no more than 1 attachment.
-validate.8=Email alarms must have at least one attendee.
-validate.9=Only email alarms can have attendees.
-validate.10=The trigger must specify which date field its duration is relative to.
-validate.11=The trigger''s duration is relative to the start date, but the parent component has no start date property.
-validate.12=The trigger''s duration is relative to the end date, but the parent component has no end date or duration property.
-
-#VEvent
-validate.14=A start date must be defined if no Method property is set at the top level of the iCalendar object.
-validate.17=The DateStart and DateEnd properties must have the same data type (they must either both be dates or both be date-times).
-validate.18=An end date and a duration cannot both be defined in the same event.
-
-#VEvent, VFreeBusy
-validate.15=A start date must be defined if an end date is defined.
-validate.16=The start date must come before the end date.
-
-#VEvent, VJournal, VTodo
-validate.13=Invalid status value of "{0}" for this component.  Valid status values are: {1}.
-validate.19=The DateStart and RecurrenceId properties must have the same data type (they must either both be dates or both be date-times)."
-
-#VFreeBusy
-validate.20={0} properties in free/busy components must always contain a time component.
-
-#VTimezone
-validate.21=At least one StandardTime or one DaylightSavingsTime property must be specified.
-
-#VTodo
-validate.22=The start date must come before the due date.
-validate.23=The DateStart and DateDue properties must have the same data type (they must either both be dates or both be date-times).
-validate.24=A due date and a duration cannot both be defined in the same to-do component.
-validate.25=A start date must be defined if a duration is defined.
-
-validate.26=Property has no value.
-
-#EnumProperty
-validate.28=Property value "{0}" is non-standard.  Standard values for this iCalendar version are: {1}
-validate.46=Property value "{0}" is not supported by this iCalendar version.  Supported versions are: {1}
-
-#PercentComplete
-validate.29=Property value "{0}" should be between 1 and 100 inclusive.
-
-#RecurrenceProperty
-validate.30=Frequency field is required.
-validate.31="Until" and "count" fields cannot both be set.
-
-#RecurrenceRule
-validate.32=Non-standard rule parts are not allowed in the latest iCalendar specification.
-
-#Trigger
-validate.33=A duration or date must be defined.
-
-#UtcOffsetProperty, Timezone
-validate.34=Minute offset must be between 0 and 59 inclusive.
-
-#Version
-validate.35=A maximum version must be specified.
-
-#RequestStatus
-validate.36=A status code must be defined.
-
-#ExceptionRule
-validate.37=This property has been removed from the latest iCalendar specification.  Its use should be avoided.
-
-#FreeBusy
-#validate.38=No time periods are defined. #removed in 0.4.6
-validate.39=One or more time periods do not have start dates.
-validate.40=One or more time periods do not have either an end date or a duration.
-
-#Geo
-validate.41=Latitude is not set.
-validate.42=Longitude is not set.
-
-#Daylight
-validate.43=One or more values are null.
-
-#RecurrenceDates
-validate.49=Property cannot contain a mix of dates and periods.
-validate.50=Date values cannot contain a mix of date and date-time values.
-validate.51=vCal 1.0 does not support period values.
-
-#RawProperty
-validate.52={0} property contains one or more invalid characters in its name.  Property names may contain letters (A-Z), numbers (0-9), and dashes (-).
-validate.59={0} property contains one or more invalid characters in its name.  Property names may contain printable, 7-bit ASCII characters, with the exception of: {1}
-
-#Image
-validate.56=A format type should be defined when the property value is in-line binary data.
-
-#==============================================================================
-#== PARSE WARNINGS ============================================================
-#==============================================================================
-
-parse.line=Line {0}\: {2}
-parse.prop={1} property\: {2}
-parse.lineWithProp=Line {0} ({1} property)\: {2}
-
-parse.0=Property has requested that it be skipped: {0}
-parse.1=Property value could not be parsed.  Reason: {0}
-#parse.16=Property could not be unmarshalled.  Unmarshalling as an XML property instead.  Reason: {0} #removed in 0.6.1-SNAPSHOT
-#parse.2=Ignoring END property that does not match up with any BEGIN properties. #removed in 0.6.1-SNAPSHOT
-#parse.3=Skipped.  {0}  The entire line is: "{1}" #removed in 0.6.1-SNAPSHOT
-parse.4=The following parameters are nameless: {0}
-parse.5=Timezone ID "{0}" not recognized.  Parsing with default timezone "{1}" instead.
-parse.23=Property value is empty.  One of the following XML elements are expected: {0}.
-parse.31=Unable to decode quoted-printable value.  Treating as plain-text.  Reason: {0}
-parse.32=The property''s character encoding ("{0}") is not supported by this system.  {1} will be used instead.
-parse.37=No VTIMEZONE component exists with an ID of \"{0}\".  ID will be treated as an Olsen timezone ID instead.
-parse.38=No VTIMEZONE component exists with an ID of \"{0}\".  ID could not be parsed as an Olsen timezone ID either.  The date will be parsed under the default timezone.
-parse.39=VTIMEZONE component ignored: No TZID property defined.
-parse.43=TZID \"{0}\" is formatted as an Olsen ID (begins with a forward slash), but no such Olsen ID exists.  Since the TZID matches that of a VTIMEZONE component, the property will use the timezone defined by the VTIMEZONE component.
-
-#DateOrDateTimePropertyScribe
-parse.6=Could not parse the raw date-time components out of the date string "{0}".
-
-#DateOrDateTimePropertyScribe, DateTimePropertyScribe
-parse.17=Could not parse date-time value.
-
-#DurationPropertyScribe
-parse.18=Could not parse duration value.
-
-#ExceptionDatesScribe
-parse.19=Could not parse date value.
-
-#GeoScribe
-parse.20=Could not parse GEO value.
-parse.21=Could not parse latitude "{0}".
-parse.22=Could not parse longitude "{0}".
-
-#IntegerPropertyScribe
-parse.24=Could not parse integer value.
-
-#TriggerScribe
-parse.25=Could not parse value as a date or duration.
-parse.26=Could not parse duration "{0}".
-parse.27=Could not parse date "{0}".
-
-#UtcOffsetPropertyScribe
-parse.28=Could not parse offset string.
-
-#XmlScribe
-parse.29=Could not parse value as XML.
-
-#RecurrencePropertyScribe
-parse.7=Invalid {0} value "{1}".
-parse.8=Ignoring non-numeric value found in {0} value: "{1}"
-parse.36="Unable to integrate "$" operator into iCalendar data model.  This data will be lost: {0}
-parse.40=Invalid token: {0}
-parse.41=Unrecognized frequency: {0}
-parse.42=Invalid day: {0}
-
-#FreeBusyScribe, RecurrenceDatesScribe
-parse.9=Time period has no start date.
-parse.10=Time period''s start date "{0}" could not be parsed.
-parse.11=Time period''s end date "{0}" could not be parsed.
-parse.12=Time period''s duration "{0}" could not be parsed.
-parse.13=Time period has no end date or duration.
-parse.14=Time period''s end date or duration "{0}" could not be parsed.
-
-#RecurrenceDatesScribe
-parse.15=Could not parse date: "{0}"
-
-#VersionScribe
-parse.30=Could not parse version value.
-
-#DaylightScribe
-parse.33=Could not parse UTC offset: {0}
-parse.34=Could not parse start date: {0}
-parse.35=Could not parse end date: {0}
-
-#==============================================================================
-#== EXCEPTION MESSAGES ========================================================
-#==============================================================================
-
-#ICalComponent
-exception.1=A problem occurred attempting to invoke the copy constructor of component class {0}.
-
-#ICalProperty
-exception.16=Parameters object cannot be null.
-exception.17=A problem occurred attempting to invoke the copy constructor of property class {0}.
-exception.26={0} parameter value is malformed and could not be parsed. Retrieve its raw text values instead by calling property.getParameters().get("{0}").
-
-#JCalRawWriter
-exception.2=Call "writeStartComponent" first.
-exception.3=Cannot write a property after calling "writeEndComponent".
-
-#FoldedLineWriter
-exception.4=Line length must be greater than 0.
-exception.5=The length of the indent string must be less than the max line length.
-
-#ICalRawLine
-exception.6=Property name required.
-
-#ICalRawReader
-#exception.7=Line is malformed--no colon character found. #removed in 0.5.1-SNAPSHOT
-
-#ICalRawWriter
-#exception.8=Property name "{0}" contains one or more invalid characters.  The following characters are not permitted: {1} #removed in 0.5.1-SNAPSHOT
-#exception.9=Property name "{0}" begins with one or more whitespace characters, which is not permitted. #removed in 0.5.1-SNAPSHOT
-#exception.10=Property "{0}" has a parameter named "{1}" whose value contains one or more invalid characters.  The following characters are not permitted: {2} #removed in 0.5.1-SNAPSHOT
-
-#XCalOutputProperties
-exception.11=Indent amount cannot be less than zero.
-
-#ICalTimeZone
-exception.12=Unable to set the raw offset.  Modify the VTIMEZONE component instead.
-
-#StreamWriter
-exception.13=No scribes were found for the following component/property classes: {0}
-
-#TimezoneInfo
-exception.14=VTimezone component must have a non-empty TimezoneId property.
-
-#FreeBusy
-#exception.15=Period cannot be null. #removed in 0.4.6
-
-#ListProperty
-exception.18=List cannot be null.
-
-#DateTimeComponents
-exception.19=Cannot parse date: {0}
-
-#Duration
-exception.20=Invalid duration string: {0}
-
-#UtcOffset
-exception.21=Offset string is not in ISO8610 format: {0}
-
-#DataUri
-exception.22=URI scheme is not "data".
-exception.23=Data portion of data URI is missing.
-exception.24=Cannot parse data URI.  Character set "{0}" is not supported by this JVM.
-exception.25=Cannot create data URI.  Character set "{0}" is not supported by this JVM.