Fixed all model object copy constructors
Merge branch 'master' of github.com:faern/book-a-hobbit

Conflicts:
	se.chalmers.TDA593.Book-a-Hobbit/src/hobbit/model/impl/AGenericBookingImpl.java
	se.chalmers.TDA593.Book-a-Hobbit/src/hobbit/model/impl/CustomerImpl.java
	se.chalmers.TDA593.Book-a-Hobbit/src/hobbit/model/impl/MasterBookingImpl.java
	se.chalmers.TDA593.Book-a-Hobbit/src/hobbit/model/impl/RoomBookingImpl.java
	se.chalmers.TDA593.Book-a-Hobbit/src/hobbit/model/impl/TypeAvailabilityImpl.java