Add testing of AJAX to travis-ci
* move tests into separate travis-ci.sh script
* fix AJAX test php files to work in PHP CLI server mode
* add more test logging to have visibility into failures
* switch to PHP environment to have access to PHP 5.4

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Merge pull request #308 from enyojs/add-ajax-ci

Add testing of AJAX to travis-ci