com_config GSoC

Hi All,
This PR consists,

1. com_config in new MVC 
2. front-end com_config, which consumes services from back end com_config and com_templates
3. library classes related to new MVC ** Implemented within the component **

Feature Tracker: http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_id=8549&tracker_item_id=31264 

Note: This is a reorganized version of com_services project.Previous one has files in library/cms , but in this new one library files are inside component folder.

Thank You !