[algorithms][num_points] remove check for starting-ending point in range_count
[test][algorithms][num_points] add test cases for open geometries (including
the edge case where the geometry is defined as open but the first/last points
are identical)
Merge pull request #133 from mkaravel/feature/counting-algorithms

Feature/counting algorithms (follow-up of PR #128)
Merge branch 'develop' into feature/buffer