add GeomBuilder, needs Jts
drawing_api: squashed
drawing_api: use JtsDrawable baseclass
- add makeCircle for testing
drawing_api: cleanups
drawing_api: refactor
drawing_api: use SpatialIndex
drawing_api: optimization + cleanup
drawing_api: VectorLayer
- use VectorLayer for PathLayer
drawing_api: make style builder more consistent with theme api
drawing_api: wip
b174f65122