Merge pull request #255 from fhahn/master

Replace ModelAdmin with ModelView in sqla ModelView example
Fixed actions include
Merge branch 'master' of github.com:/mrjoes/flask-admin
Added form_extra_columns. Fixed #256
Peewee fixes
Fixed #247. on_model_change now accepts third parameter is_created
Fixed #209. Automatic join for m2m relations
Fixed #201. Updated sample to automatically scroll content
URLField, EmailField are now searchable in MongoEngine backend. #151
Fixed #178
Styling
Typo
Waffle icon
Update README.rst
MongoEngine GridFS support
Merge branch 'master' of github.com:/mrjoes/flask-admin
MongoEngine ImageField support. Fixes #257.
Minor CSS changes, fixed mongoengine field ordering
Enable python 3.3 in travis configuration
Fixed inline field template name collision