[emacs] Cleaned up emacs. Added web-mode via elpa.

* Deleted some configuration that I wasn't using. Just keep it as simple as
  possible for now.
* Added web-mode. Looks to be a better fit than php-mode + multi-web-mode.
  See http://web-mode.org/ for more tips and tricks.
[git] Added .DS_Store to list of files to ignore.
Added update to emacs config.
Removed ssh aliases in favor of using ssh config files.
Merge branch 'master' of git://github.com/mravery/emacsconfig