just a start on the phing  task #41
first attempt at phing test task that runs phpunit
updates phing to dev-master, phpunit to 4.1
fix whitespace
Execute PHPUnit with ExecTask
Use PHPUnit from vendor
Merge branch 'modernization' into add-phing
Merge branch 'add-phing' of https://github.com/rskuipers/Opentok-PHP-SDK into rskuipers-add-phing
removes hello task
Merge branch 'rskuipers-add-phing' into add-phing
adds development and contribution guidelines