Intermediate state: implemented bookkeeping for nodes.
Print diff: completed bookkeeping.
Diff display: implemented independent mode selection.
Implemented diff for all modes. Basically tested diff.
Diff in all modes: tests accomplished.
Simple viewer for new change format. Needs refactoring.
Minor tweak.
Geometry for relations: added tests.
Preparing compressed attic relations: shell without diff algorithm.
Compress attic relations: implemented a first simple compression algorithm and a converter.
Cleared a test bug before converting attic relations.
Refactoring.
Relation deltas: preparations.
Relation deltas: preparations.
Compressing attic relations: a version that at least works.
Compress attic relations: implemented and tested.
Merge branch 'global-diff-output' into speedup-relations
JavaScript to demonstrate diff format usage..
Clean-up of JavaScript code. Not yet tested.
Fixed some bugs.