Adding Datastore functionality

Pulling changes from Datastore
Merge branch 'Build3' of https://github.com/pranjalnatu/Schedula into Build3

Conflicts:

	Schedula-build4/war/WEB-INF/appengine-generated/datastore-indexes-auto.xml
	Schedula-build4/war/WEB-INF/appengine-generated/local_db.bin
	Schedula-build4/war/WEB-INF/classes/.gitignore
	Schedula-build4/war/classinfo.jsp