Stop breaking every time a CSS or JS change is made.

Enabled an apache option which makes sure to read and cache static files so that file format/encoding is irrelevant.  Require for running from an NFS or other shared file system (which the Vagrant mounted disk is).

http://stackoverflow.com/questions/12782946/js-and-css-files-in-vagrant-not-properly-encoded-when-saved-outside-of-the-vm