Implemented Model-level constraints. They have the form [ model: source operator target ], and includes the ability to constraint a class's inheritance, require an attribute be present in a class with a specific name and require there be an association to a specific class(with the possibility to constrain the multiplicity of the association)


git-svn-id: http://umple.googlecode.com/svn/trunk@4281 6ebf9d09-8eb1-0036-9d08-68c07d1b990a