User diff-highlight

Signed-off-by: Stephen Celis <stephen@stephencelis.com>
Update submodules

Signed-off-by: Stephen Celis <stephen@stephencelis.com>
Don't use MacRuby for syntax checks

Using MacRuby was an experiment.

That experiment is over.

:skull:

Signed-off-by: Stephen Celis <stephen@stephencelis.com>