add files for travis-ci

* Rails アプリを Travis CI で動かすためのメモ: http://bekkou68.hatenablog.com/entry/2014/03/14/225656
* RailsアプリをTravisCIでCIするまでの手順メモ:  http://qiita.com/knt45/items/1304bdd7a2f1d2f6a351
Using PostgreSQL on Travis CI

http://docs.travis-ci.com/user/using-postgresql/
resolve conflict of README.md
Merge branch 'MiCHiLU-travis-ci'