Haversine to sphere (#205)

* move haversine module to sphere

* lint

* fix tests

* added back datasets

* version bump

---------

Co-authored-by: Philippe Miron <philippe.miron@dtn.com>

Author: philippemiron

clouddrift/__init__.py

@@ -6,5 +6,4 @@
 import clouddrift.adapters
 import clouddrift.analysis
 import clouddrift.datasets
-import clouddrift.haversine
 import clouddrift.sphere

clouddrift/analysis.py

@@ -10,7 +10,7 @@
 from concurrent import futures
 from datetime import timedelta
 import warnings
-from clouddrift.haversine import distance, bearing, position_from_distance_and_bearing
+from clouddrift.sphere import distance, bearing, position_from_distance_and_bearing
 
 
 def apply_ragged(