Updated php 5.4.32 to 5.4.33 and 5.5.16 to 5.5.17
Updated php rabbitmq-c from 0.5.1 to 0.5.2
Updated hhvm from 3.2.0 to 3.3.0
Merge branch 'php' of https://github.com/GrahamCampbell/travis-cookbooks
Merge branch 'rabbitmq' of https://github.com/GrahamCampbell/travis-cookbooks
Merge branch 'hhvm' of https://github.com/GrahamCampbell/travis-cookbooks
Ensure libmemcached is installed for PHP memcached extion 2.2.0.