PayU.in Payment Driver

Payment driver for PayU.in - PayU.in is payment gateway for Indian
merchants to enable take payment in INR.
Added asset toggle setting
More code formatting
Sorted css & js into separate folders
Updated controllers to reflect asset changes
Merge pull request #401 from dakshhmehta/1.2/develop

PayU.in Payment Driver
Merge pull request #406 from superrbstudio/1.2/develop

Object check and some classes on the modifier form