thoughtbot/capybara-webkit — pull request #591 by kgrz (2013-11-14 09:06:43+00:00)
Title: Throw an informative error if Qt is not present

Right now, running "gem install capybara-webkit" on a machine that
doesn't have Qt binaries installed fails with the
message "'qmake -spec macs-g++' not available". This change will check
if a binary is installed and throw a descriptive error.

Fixes #590