Add filters list for thumbor templatetag, ref #420
Merge pull request #422 from opps/improves_thumbor_templatetag

Add filters list for thumbor templatetag, ref #420
Merge branch 'stable/0.2.x' of github.com:opps/opps into release_0291

* 'stable/0.2.x' of github.com:opps/opps:
  Add filters list for thumbor templatetag, ref #420