Started to add unit tests and documentation for Polygon
Finished up to the end of intersection
Finished Unit tests for Polygon
Merge branch 'master' into jtscala-polygonSpec
Merge pull request #760 from BrandonNoad/jtscala-polygonSpec

Adding Unit Tests/Documentation for Polygon and Cleaning Up Related Results
Remove get() from tests.
Fix tests.

Forgot to change some RasterSources to Rasters.
Merge branch 'master' into localops