install: codeclimate-test
Merge pull request #67 from MaxMEllon/install-codeclimate-test-reporter

merge: install-codeclimate-test-reporter -> install-rspec
delete: coverageをgit対象外に
install: 便利そうなgemいくつか追加
config: better_errors用設定，リモートからリッチなエラー画面表示可能に
install: kaminari
Merge pull request #68 from MaxMEllon/install-rspec

merge: develop -> install-rspec
Merge pull request #69 from MaxMEllon/develop

merge: develop -> master