correctness fixes

This release and the previous one tweaks a few of the algorithms for edge cases related to polygon containment and intersection:

• intersects now handles fully contained shapes (whoops)
• polygonContains now correctly handles points that are on the lines of the outer polygon, this is an edge case but a nice one
• Geometry.contains now respects holes. This was never implemented

Other changes:

• new randomPoints extension function on Geometry that may be used for testing. It produces a sequence of points.
• equirectangular distance for when haversine is too slow. Fine over short distances but don't use over larger distances
• one of the distance functions has been renamed to make it clear it measures distance to a line

3.4.20

• improve expand polygon
• add Geometry.intersects algorithm and improve polygonContains to better handle edge cases

3.4.18

less buggy urlEncode implementation

3.4.17: add regex based coordinate parsing and validation

Adds parse and validation functions for lat, lon combinations in strings using a non trivial regex that should be bullet proof against all the common edge cases.

3.4.16: improve overlaps algorithm for polygons

• improved polygon overlap algorithm
• misc Tile improvements

3.4.12

add Tile.fromPath(string)

Full Changelog: 3.4.11...3.4.12

3.4.11

adds Tile quad tree keys (string and long) functions.

3.4.10: deal with some edge cases for tile bounding boxes

A few more edge cases with Tile bbox calculations; add more tests.

3.4.9

Fix bug with tile bbox

3.4.8

Improve Tile functionality