Implementing processor to process bill transactions

alter table bill modify total_charges double
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/java/com/sjsu/bikelet/domain/Bill.java
	src/main/java/com/sjsu/bikelet/service/BillService.java
	src/main/java/com/sjsu/bikelet/service/BillServiceImpl.java