fixed compile issues with bill & group ctrls which were resurrected in the previous build.
removed jsonview from bill,group ctrls (Spring upgrade to 3.2 deprecates them). Temporarily commented out certain methods to get it to build. Currently in the process of adding a bill from the front end and ensuring that it gets persisted. Verified that the addBill() method of backend billcontroller is indeed able to receive the bill obj properly! The call seem to fail in the save() method of billdao.