PHP 5.4 is required because of the dependency on flysystem
Minimal PHP version is now 5.4, added xhprof extension for Travis-CI
Add some more PHP versions to test and use apt instead of PECL to keep hhvm testing possible
Scrutinizer-CI doesn't recognise pdepend
Use ##profiler instead of the reserved Freenode channel
Added hack to only install xhprof through PECL when NOT on HHVM, since HHVM doesn't have PECL
Fail gracefully when not being able to install xhprof or not on PHP (but HHVM), and remove loading xhprof
Be more explicit in the if-statement
Annotate File variables, since it'll return an Abstract handler instead
Merge pull request #33 from dennisdegreef/cleanup

Minimal PHP version is now 5.4, added xhprof extension for Travis-CI