Added RegionGroup operation.
Added ToVector operation.

Currently does not return polygons with holes.
Merge remote-tracking branch 'upstream/master' into vectorization
Removing comments in test.
Second version of ToVector.

Still only works with 4-neighborhoods. Now properly creates polygon for convex shapes. Abandoned using JTS's Convex Hull algorithm since we need to support convex shapes, instead use an algorithm that walks the parimeter.
Vectorization supports holes.

Also:
- Refactored feature and LoadGeoJson
- Wrote GeoJsonWriter, can now convert features into GeoJson
Fixed server project.
Merge pull request #509 from lossyrob/vectorization

Added ToVector operation