[debug] Added class to count objects in memory for debugging
[rtree] Implement a STR-R-Tree for bounding box querries.
[utils] Added archive format and save serilation and leafs in it
[geodata] Allow empty datasets
[kdtree] Remove kdtree since it is replaced by RTree
[tests] Moved kdtree-test to geodata-test
[geodata] Rebuild temp file handling for leaf files