Updated for Rails 4
Remove bcrypt
Merge branch 'rails4'
Set minimum ruby version
Updated travis
Monkey patch ActiveSupport::Concern to support prepend

Ruby 2.0's prepend needs love too.

This is a cleaner implementation and replaces the previous
ReverseConcern mixin
Fixes for Rails 4.0.0.rc1
Better gemspec version locking
Bump Rails RC
Add rspec formatting.

--format doc has some nice output.
Update Code Climate
Update easy_auth.gemspec
Identities will now work with array'd uids
Conditional travis username
travis now has phantom
Use autosave on association
Removed comments
Uses gin index for the array column, which makes overlap checks much quicker
Merge pull request #8 from dockyard/dm-fix-migration

Uses gin index for the array column, which makes overlap checks much quicker
Extract to sign out url method for cleaner injection