Fix lists in README.md for rubydoc.info

The rubydoc.info md parser requires an empty line before bullet lists to recognize them.
Fixed AR adapter
Merge pull request #601 from DavidS/patch-1

Fix lists in README.md for rubydoc.info
Add logged_in? method to test_helpers
Add public #locked? method
Merge pull request #598 from rogercampos/public_locked_method

Add public #locked? method
Merge pull request #597 from rogercampos/logged_in_user_test_helper

Add logged_in? method to test_helpers
Global controller specs #586
Cleanup