Refactor Testing

[sdpeyton]

With features getting more complex, testing will need to be re-architected to be more efficient at getting high coverage. Specifically, we need:

• a common access point for geometries
• coverage of bbox, single and multi-part geometries, feature collections, union geometries
• coverage for all possible geometry input formats
• a standard for how these tests are asserted

[DanielJDufour]

Add comparison in performance to GDAL and ArcPY, rasterio across functions