Feature/adds php5 5 functionality

Changes:

  * Adds php 5.5 compatibility
  * Removes php5-intl and php5-apc (not installed at our latest shared servers anymore)
  * Uses the new sneakers wheezy (7.3) boxes for php 5.4 and php 5.5
  * Uses the sneakers squeeze (6.0.7) box for php 5.3