Adam Wulkiewicz 6b74f7c8a3 Support umbrella strategies in relops, setops, index, buffer and more.
Also is_simple, is_valid and extensions like dissolve and nsphere relops.

Add umbrella strategies:
 - relate: used in setops, relops, buffer, is_xxx, dissolve, etc.
 - index: used in rtree
 - io: used in wkt read/write and extensions/shapefile

Replace `point_box_by_side` agnostic strategy with CS-specific strategies.

Fix passing of strategies (no defaults when user-defined strategy is
passed) in places like buffer and distance.

Alter tests accordingly.
2020-10-21 17:42:02 +02:00
..