try fix
add Coveralls

* CoverallsでRailsアプリのテストのカバレッジ率を取得する手順メモ: http://qiita.com/knt45/items/58cacf895c0e5ad9228b
try fix an error on Travis-CI by hand generate
Merge branch 'coveralls' into iss-304_feature_of_synchronizing_github