Added .rb to migrations
Updated travis settings to specific rails version
Updated rbx travis settings
Fixed issue with has_role? improperly checking new_records
Added 'any instance' capability to User.with_role

(cherry picked from commit b90594fd5e64d9d954c50e54777e7a3f6949707b)

Conflicts:
	lib/rolify/finders.rb
Added any-resource scoping to User.has_role?
[skip ci]
Changed generators to allow multiple user classes

(cherry picked from commit 4f7c0f9efa5cf6c3146d427612efd8e1bcd2961e)
[skip ci]
Merge branch 'new-record_fix'

* new-record_fix:
  Fixed issue with has_role? improperly checking new_records
  Updated rbx travis settings
  Updated travis settings to specific rails version
  Added .rb to migrations
Merge branch 'multiple-user-classes'

* multiple-user-classes:
  Changed generators to allow multiple user classes
Merge branch 'any-resource'

* any-resource:
  Added any-resource scoping to User.has_role? [skip ci]
  Added 'any instance' capability to User.with_role

Conflicts:
	lib/rolify/finders.rb
	lib/rolify/role.rb