aligned composer.json with other packages in ZF2

require php 5.3.3, set a branch alias for 2.0.x, do not require phpunit
make it possible to alias checks and run them invdividually
Merge remote-tracking branch 'origin/feature/runner-cs-tweaks' into feature/runner

Conflicts:
	src/ZendDiagnostics/Runner/Reporter/BasicConsole.php
CS