記法を統一
Now users are able to select a tag with an autocomplete text field.
GoogleOAuth2関連の修正

- GoogleOAuth2を用いたログインのリンク位置を修正。
- 同リンク文字列をローカライズ。
- 上記に合わせてテストも修正
Add markdown help modal
added .DS_Store in .gitignore
refined tag autocomplete input field
fixed edit article feature spec
Due to failure at Travis-CI, increased timeout threshold: 30 sec -> 60 sec
Merge pull request #92 from kakipo/article_tag_autocomplete

タグ入力補完機能の実装
Merge branch 'add-markdown-help' of https://github.com/kami30k/lodge into kami30k-add-markdown-help

Conflicts:
	app/views/articles/_form.html.erb
Merge branch 'kami30k-add-markdown-help' into develop