add version number to gnuviechadmin

- add __version__ to gnuviechadmin/__init__.py
- change docs/conf.py to use version number from gnuviechadmin
- add gnuviechadmin.context_processors.version_info to add
  gnuviechadmin_version to template context
- add version and technology links to templates/base.html footer
- add CSS styles for footer formatting

docs/conf.py

@@ -59,10 +59,11 @@ copyright = u'2014, 2015 Jan Dittberner'
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
-# The short X.Y version.
-version = '0.11'
 # The full version, including alpha/beta/rc tags.
-release = '0.11.0'
+from gnuviechadmin import __version__ as release
+
+# The short X.Y version.
+version = ".".join(release.split('.')[:2])
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.