DOC: Don't include the commit hash in the docs titles

docs/source/conf.py

@@ -43,8 +43,8 @@ master_doc = 'index'
 project = u'Zipline'
 copyright = u'2016, Quantopian Inc.'
 
-# The full version, including alpha/beta/rc tags.
-release = version
+# The full version, including alpha/beta/rc tags, but excluding the commit hash
+release = version.split('+', 1)[0]
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.