Fixed issue with connection binding path from connection to bound
resource.
Fixed issue with not adding binding paths if types are not contained.
They are always added. This will be checked separately when the paths
are processed or inconsistency is checked.
We do the same for connection based paths.
added equivalence mapping.

added handling of transformations, equivalence on connection paths and
on binding paths.

contains now returns false if either parameter is null. It was returning
true before. Checked usage.
renamed method to better reflect function of handling outgoing
propagations or features.