Added rewrites tab, minor code refactoring
Merge branch 'develop' of github.com:magento-hackathon/Hackathon_MageMonitoring into develop

Conflicts:
	app/code/community/Hackathon/MageMonitoring/Block/System/Overview/Read/Tabs/Php.php
	app/code/community/Hackathon/MageMonitoring/controllers/Adminhtml/MonitoringController.php
Merge branch 'develop' of github.com:magento-hackathon/Hackathon_MageMonitoring into develop