enhance travis setuptools_scm situation

* add setuptools_scm to the development requirements
* print the own version at install time
* unshallow the repo and fetch all tags

.travis.yml

@@ -38,6 +38,7 @@ matrix:
           env: TOXENV=py36
 
 install:
+    - git fetch --unshallow --tags
     - ./.travis/install.sh
 
 script:

.travis/install.sh

@@ -47,4 +47,5 @@ python -m virtualenv ~/.venv
 source ~/.venv/bin/activate
 pip install -r requirements.d/development.txt
 pip install codecov
+python setup.py --version
 pip install -e .[fuse]

requirements.d/development.txt

@@ -1,4 +1,5 @@
 setuptools
+setuptools_scm
 pip
 virtualenv<14.0
 tox