11 use php 53

Change to PHP 5.3 to match production server's PHP version
* prevents the possibility of using new shiny PHP 5.5 syntax and
  having our code break in production.

Properly symlink the virtual host configuration for Apache2
* for some reason it wasn't being migrated over. Fixed that with
  a hack.

@DiscoBBQ: please confirm that this works on your machine. you will need to destroy your current vagrant machine (`vagrant destroy`) and recreate it (`vagrant up`). Once you confirm that it does work, please merge into master

This fixes #11