Merge pull request #5 from miwara/dev_env

add postgresql recipe
Merge pull request #6 from miwara/dev_env

Dev env
Merge pull request #7 from miwara/]

]
Merge pull request #8 from miwara/master

merge
Merge pull request #9 from miwara/dev_env

Merge pull request #8 from miwara/master
Berksfileを追加，nodeファイルもそれに合わせて変更
Berksfile.lockを除外