First implementation of constraints
Changed JavaProjectModel so it uses getCompilationUnits internally as
well
Changed ast caching of Expression
Merge branch 'master' of github.com:cderoove/damp.ekeko

Conflicts:
	DampDependencies/.classpath
	DampDependencies/META-INF/MANIFEST.MF
	DampDependencies/build.properties
	EkekoPlugin/src/damp/ekeko/jdt/reification.clj