Change test to use acts_like? so that we can have DateTime fields
Use User and Admin orm_adapter adapter in tests to support other ORMs (neo4j, in this case)
User Model.to_adapter directly as suggested by @josevalim
Update README.md

Add more description on the way I18n.locale has to be set in case of multi-locale app.
Merge pull request #3060 from thomasdarde/patch-1

Update README.md
Merge pull request #3054 from cheerfulstoic/devise-neo4j

Changes to support devise-neo4j