improvement of evaluate() -mechanism

[dieuska]

At the moment the function grb-evaluate () will evaluate geometries and their formula and compares theme with other version to give an indication if the geometry can be actualised automatically or not. This function is a first base-implementation but can be improved with more logic and cases

[dieuska]

# TODO: research for aanduid_id 116448 (equality after 0.5m), 120194 (1m)
# TODO: research and implementation of following ideas
# TODO: refine equality comparison, make it more generic
# TODO: Add control of OD to equality-comparison (see case aanduid_id 120288)
# ideas:
# * If result_diff smaller than 0.x --> automatic update
# * big polygons: If 'outer ring' has same formula (do net check inner side) -->
#   automatic update
# ** outer ring can be calculated: 1) negative buffer 2) original - buffered

[dieuska]

at the moment, the evaluation-function gives an evaluation for all predicted geometries. Maybe we should also rank these evaluations so we can already give a list of the 'best' evaluations?