bump NEWS for 2.51

NEWS

@@ -1,3 +1,28 @@
+=== Transmission 2.51 (2012/xx/yy) ===
+[http://trac.transmissionbt.com/query?milestone=2.51&group=component&order=severity All tickets closed by this release]
+==== All Platforms ====
+  * Update the bundled libnatpmp and miniupnp libraries for port forwarding
+  * Add environment variable options to have libcurl verify SSL certs
+  * Support user-specified CXX environment variables during compile time
+==== Mac ====
+  * Raise the number formatter limits for configuration options
+  * Fix regression that ignored user-specified TRANSMISSION_HOME environment
+==== GTK+ ====
+  * Honor the notification sound setting
+  * Add a tooltip to files in the torrents' file list
+  * Fix broken handling of the Cancel button in the "Open URL" dialog
+  * Improve support for Gnome Shell and Unity
+  * Catch SIGTERM instead of SIGKILL
+==== Qt ====
+  * Progressbar colors are now similar to the Mac and Web clients'
+  * Improve the "Open Folder" behavior
+==== Web Client ====
+  * Fix sometimes-incorrect ratio being displayed in the Inspector
+  * If multiple torrents are selected, show the aggregate info in the Inspector
+  * Upgrade to jQuery 1.7.2
+==== Daemon ====
+  * Show magnet link information in transmission-remote -i
+
 === Transmission 2.50 (2012/02/14) ===
 [http://trac.transmissionbt.com/query?milestone=2.50&group=component&order=severity All tickets closed by this release]
 ==== All Platforms ====