Stop the stupid compile warnings for init.el
Hack auto-complete's ac-dictionary-directories variable

The package doesn't seem to know where it should load these from. This
lame hack should keep working even when I upgrade the package.
First draft of prog-mode hook

php-mode is mostly working as desired, but apparently I broke
php-auto-yasnippet at some point in the past, so I'm not getting
auto-completions for it until I've done them manually.