Fixed ReturnService to update the right amount. Also fixed an uncaught
exception in Customer.java
Delete TopSellingReport.jsp
Some more feedback for Returns
Merge branch 'master' of git@github.com:Makthum/AMS-Retail-Solution.git
Merge branch 'master' of git@github.com:Makthum/AMS-Retail-Solution.git

Conflicts:
	Allergo Music Store/src/com/ubc/ca/model/Return.java
	Allergo Music Store/src/com/ubc/ca/service/ReturnService.java
Merge branch 'master' of git@github.com:Makthum/AMS-Retail-Solution.git

Conflicts:
	Allergo Music Store/src/com/ubc/ca/model/Return.java
	Allergo Music Store/src/com/ubc/ca/service/ReturnService.java