Enhancement: updates

 * php 5.5 build
 * add zf1 via our own fork
Enhancement: remove customized setup script

 * ext/memcache is available on travis-ci
 * no need to download/install composer, it's here
Enhancement: ensure ext/memcache is loaded
Updates: memcache and additional "test"

 * ensure memcache is started for a travis-ci build
 * always validate composer.json ;)
Fix: validate composer.json
Merge pull request #6 from lagged/topics/updates

Enhancement: updates