Permission Denied fix

As defined on https://github.com/bower/bower#installing-packages-and-dependencies, https://github.com/someone/some-package.git and git@github.com:someone/some-package.git will treat the repos as private and try to authenticate via prompt or SSH keys. This is problematic for a Staging/Production server that doesnt have a github account.

Switching to git://github.com/jozzhart/tinymce.git#4.0.22 should resolve the issue.