TopoJSON: Override SpaceModel-ID. Bugfix attributes Object.
Introduced scroll constraints in MapFrame.
added test dir to ignore for now
Refined scroll constraints for map frame: Keep relative scale and reset min/max scale constraints.
Reintroduced CacheAsBitmap, Introduced spatial index.
Added spatial index to space model, must be activated manually. SymbolLayer uses index for recenter and rescale.
Bugfix GridIndex & GridIndexIterator. Introduced manual Map content caching when cacheAsBitmap fails.
Re-enabled all mouse handlers.
TopoJson post-processing includes creation of a center point (center).
Introduced IDataModel.clear
Fixed bug related to MapFrame-Caching and interaction.