Replace enum documentation hack with enum-tools decorator (#136)

* Include `enum_tools`

* Set up enum documentation with `document_enum`

* Remove documentation hack from `RepresentableEnum`

* Add missing `enum-tools` dependency to `setup.py`

Author: lukasjuhrich

Diff for: docs/conf.py

@@ -40,6 +40,7 @@
     'sphinx.ext.todo',
     'sphinx.ext.doctest',
     'sphinx.ext.viewcode',
+    'enum_tools.autoenum',
 ]
 
 # Add any paths that contain templates here, relative to this directory.