OSHDBContribution evaluator

[SlowMo24]

A Class that takes OSHDBContributions returns more detailed information like the type of tagChange or memberlistChange etc.

spin-off from https://gitlab.gistools.geog.uni-heidelberg.de/giscience/big-data/ohsome/oshdb/issues/118

see: https://gitlab.gistools.geog.uni-heidelberg.de/giscience/big-data/ohsome/oshdb/issues/120

Helpful Methods:

• [X] evaluateTags to get a detailed view of the tags changed
• [ ] evaluateGeometries get a detailed view of the geometryChanges. This should be rather generic. Default methods are
  • [x] area changes
  • [x] length changes
  • [ ] movement
  • [ ] objectnr. (geomCollect.)
  • [ ] experimental!: rounder, more squared (helpful for building analyses)
  • [ ] other ideas? ...