Renamed EqualityTrait to ReferenceEqualityTrait.
Added ValueEqualityTrait.
Updated method comment.
Added custom equivalence relation implementation.
Updated unit tests.
Updated example application.
Added keyword "final" to the class signature and modfied visibility of the constructor from "private" to "protected".
Removed old unused files.
Enhanced documentation.
Updated description and keywords.
Prepared version 0.2.0-stable.