fix rst sub-title
generate release 0.2.9.1
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
Merge branch 'stable/0.2.x' of github.com:opps/opps into release_0291

* 'stable/0.2.x' of github.com:opps/opps:
  Update CHANGELOG.rst
  Update CHANGELOG.rst
Merge pull request #421 from opps/release_0291

Release 0291