edited usecases 10,11 and added test case 10,11
Merge https://github.com/CMPUT-301F14T10/project

Conflicts:
	Doc/Real Use Cases.odt
	QueueUnderflowTest/src/ca/ualberta/cs/queueunderflow/test/UseCase10.java
	QueueUnderflowTest/src/ca/ualberta/cs/queueunderflow/test/UseCase11.java
edited usecases 10,11