Work in progress.
Work in progress on new relationship entity handling etc.
Sorting and merging different features into appropriate branches, work
in progress.
Work in progress on relationship entities.
Work in progress.
Work in progress, before rebase on develop.
Rebased on modified develop branch.
Work in progress.
Work in progress.
Work in progress.
Work in progress.
Work in progress.
Fixed LinkedTreeNode implementation.
Removed getRelationshipType by making Relation interface extend RelationshipType, so we could replace it by name() method of RelationshipType interface.
Initial version
added childElements property again
First working implementation of new relationship entites.