Enable vim matchit plugin for % in HTML files.
Change ftplugin set to setlocal.
Fix HTML shiftwidth overriding PHP shiftwidth.
Add CSS shiftwidth setting.
Remove vimball plugin.
Remove LaTeX settings.
Move PHP highlighting settings to after/.

They weren't being loaded in ftplugin/.
Move PHP compiler definition to compiler file.

Initialise with :compiler, run with :make.
Remove duplicate backspace setting.
Fix comment.
Move max textwidth up so it gets overridden by special-case.
Only set columns with GUI.