Add global release version to docs.

docs/conf.py

@@ -15,6 +15,9 @@
 import sys
 import os
 
+execfile(os.path.join(os.pardir, 'tailbone', '_version.py'))
+
+
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
@@ -56,7 +59,7 @@ copyright = u'2014, Lance Edgar'
 # The short X.Y version.
 version = '0.3'
 # The full version, including alpha/beta/rc tags.
-release = '0.3.12'
+release = __version__
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.