Add Member and Method classes.
Did not create an Attribute class or the parameter class, because they are identical to the method class.
Added clone options for Elements. This will copy data memebers. Currently, I do not have a way to re-link classes and relationships (or even to know if they are in the same group that was copied). So I leave them null.
Also fixed set and get for Point p in element. and end in Relationship.
Merge remote-tracking branch 'origin/Copy_Element'

Conflicts:
	src/Element/Element.java
	src/Element/ElementClass.java
	src/Element/ElementRelationship.java