An error occurred while installing capybara-webkit (1.1.1), and Bundler cannot continue.

HOUND CIを入れる過程で発生。

	An error occurred while installing capybara-webkit (1.1.1), and Bundler cannot
	continue.
	Make sure that `gem install capybara-webkit -v '1.1.1'` succeeds before
	bundling.
	Could not find capybara-webkit-1.1.1 in any of the sources
	Run `bundle install` to install missing gems.

view raw gistfile1.txt hosted with ❤ by GitHub

libqtwebkit-devライブラリを追加することで解決するようだ。
→参考

macの場合は下記で行う

brew update
brew install qt