Demo project final commit

Hi,

I committed the changes for the grails challenge project to be done under the 1 hour contract in oDesk.
Please review the changes at your convenience.
The source has -:
1. Two domain classes - Charge and Customer, Charge belongs to Customer.
2. In the scaffold-ed ChargeController, I added an action 'summary' and a corresponding view having three lists, failed transactions, refunded transactions and successful transactions.
3. I have changed the url mapping of "/" to point to (controller: 'charge', action: 'summary')
4. I have added the tests to test the following -:
    a. The summary page has three lists
    b. The successful list has ten entries
    c. The failed list has five items.

Regards,
Prithu Adhikary