v2.6.4

• Skip "models/concerns", #194
• Fix #173 where annotate says "Nothing to annotate" in rails 4.2
• Display an error message if not run from the root of the project, #186
• Support rails 4.0 new default test directory, #182
• Add an option to show timestamp in routes "-timestamp", #136
• Skip plain ruby objects if they have the same class name as an ActiveRecord object, #121