Quick

Temporarly disable xctool + OS X due to a xctool "bug"

Due to the `pending` specs using a `print` xctool fails generating the report, which in turn makes the tests fail.

See https://github.com/facebook/xctool/issues/314#issuecomment-152988101 and c    omments for details.

See https://circleci.com/gh/mokagio/Quick/14 for a proof that without `print` the test pass.ease enter the commit message for your changes.