bootstrap-tagsinput-rails 젬 추가하고 favlinks form 에 적용함.

In Gemfile, 

```ruby
gem 'bootstrap-tagsinput-rails'
```

In app/views/favlinks/_form.html.erb

```erb
<div class="form-group">
  <%= f.input :tag_list, placeholder: '여러 개의 태그는 쉼표(,)로 구분하세요.', input_html: { data: {role: 'tagsinput' }, class: 'form-control'} %>
</div>
```

Screen Capture
![2014-10-07_12-42-13](https://cloud.githubusercontent.com/assets/511048/4537062/ef32e06e-4dd3-11e4-92f8-0b8f2b177b77.png)