Updated .travis.yml
Implemented clone based on Anssi's suggestion.

Doesn't seem to be needed now, but better be safe than sorry.
Docs: Add example about using custom Tag
Merge pull request #149 from unho/docs_improvements

Docs: Add example about using custom Tag
Update documentation on fake migration requirement

Will help users (like me) who ran into issue #125
Update index.txt
Set serialize=False on TaggableManager to fix tagged object serializing
Updated Django Versions.
Merge pull request #152 from asfaltboy/patch-1

Update documentation on fake migration requirement
Merge pull request #159 from adamgreig/fix-serializing

Set serialize=False on TaggableManager to fix tagged object serializing
Simplified ExtraJoinRestriction.as_sql
user aware tags
fix tag creation
fix unique columns
tag grouping