Renamed CmpProperties to CmpProperty.
Refactored the robustness tests of CmpProperty to make them reusable.
Removed unused code from CmpPropertyTest.
Added tests to MultiDependencyProperty (including some minor refactoring).
Refactored CmpProperty to exploit the features of MultiDependencyProperty.
Added OrProperty.
Added AndProperty.
Removed unused import.
Renamed the class Comparators to Equality.
Removed unused import.
Fixed a javadoc error.