fix #402 no tag form in note_card/project

spec/models/card/usage_spec.rb に以下のように記述してください。
```ruby
require "spec_helper"

describe Card::Usage do
  let(:usage){FactoryGirl.build :usage}

  describe "#is_taggable?" do
    subject{usage.is_taggable?}
    it{should be false}
  end
end
```