Added check for php_flag
Merge remote-tracking branch 'origin/master' into check_config_for_php_flag

Conflicts:
	DependencyInjection/LiipMonitorExtension.php
Merge remote-tracking branch 'upstream/master' into check_config_for_php_flag
Removed debug and added some documentation
Merge pull request #57 from frne/check_config_for_php_flag

Add check-config for php_flag