rails 4.1.1 support

removing ActiveModel::MassAssignmentSecurity since that no longer available in rails 4.1.1
Fix MarkerInstanceMethods for two-word model names (i.e. ContentItem should create content_items instance methods, not contentitems)
Bump version

Needed for 5e149c1
Merge remote-tracking branch 'timrogers/master'
Merge remote-tracking branch '41studio/master'