gem-versions -- update CI tests for ruby 2.1.5 and rails 4.1/4.2
gem-versions -- updated travis.yml to exclude ruby-2.1.5@rails-3.1
gem-versions -- travis.yml -- exclude instead of allow failures
Merge branch 'gem-versions'
spec -- db schema -- index created after rake migration
bump version -- 0.6.7
updated gems/tests for ruby 2.1 and rails 4.1/4