Added wrapper for boundary and crosses
Removed PolygonSetBoundaryResult and replaced it with an implicit conversion from jts.MultiLineString to LineSetResult. Added area to GC. Completed contains and within.
Merge pull request #739 from BrandonNoad/jtscala-boundary-crosses

Feature Project - Added wrapper for boundary and crosses
Added Dimensionality concept into the type system.

Changed crosses to use the Dimensionality of a Geometry instead of overloading across specific instances.
Modified contains, crosses, and within to use Dimensions.
Merge pull request #743 from lossyrob/geometry/methods

Added Dimensionality concept into the type system.
Merge branch 'master' into localops
Add Pow operation.

Needs a unit test for sequence still.