Add PHP 5.3.3 and PHP 5.6 to travis
Adding hhvm
Adding PHPUnit 3.7 to build matrix
Only do code coverage on one build
Fix up code coverage in travis
Only add PHP 5.6 and run coverage on one build
Remove PHP 5.3.3, there is a separate issue for this.
Fix code coverage logic
Merge pull request #178 from elliotchance/1.3.1/161-add-php56-to-travis

1.3.1/161 add php56 to travis