Add DebugKit panel and minor cleanup.
CS fixes.
attempt to fix travis
symlink
order
Ignoring XHProfPanel when generating code coverage for now.
Merge branch 'dereuromark-master'
Only testing the last three releases in the 2.x series.

Despite the plugin still works on 2.2 it is somehow difficult to make the tests pass.
Adding coveralls.
Adding requirements to a composer.json file first.
Creating the composer file with composer init.
Configuring source dir.