Replaced rtree with cKDTree in _GeographicObjects
Replaced rtree with cKDTree in _GeographicObjects


Former-commit-id: 16e4dbd1076f43e7b588ef6b68cf8ae7980e14d1 [formerly 16e4dbd1076f43e7b588ef6b68cf8ae7980e14d1 [formerly 0f8b44b44c79c5b6d331145d4ac09ae3da00c1c5]]
Former-commit-id: 989ffbe83ff336027d4708eb5eb965972880bc38
Former-commit-id: 43fe54d53706d5234ad753799632763587aed8a0
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine