Finished new listing feature with database

finished new listing feature
Merging New Listing Window

Conflicts:
	UsedBookStore311/UsedBookStore/Controller.cs
	UsedBookStore311/UsedBookStore/DatabaseManager.cs
	UsedBookStore311/UsedBookStore/obj/Debug/DesignTimeResolveAssemblyReferences.cache
	UsedBookStore311/UsedBookStore311.v11.suo