added build step
Added polygon symbols to results grid.
Added polygon renderer to ResultLayer.

Closes #105
Fixed tests
Layer Ordering

Broke out search graphics into a new Graphics Layer instead of the default graphics layer to make sure that they are always on the bottom.

Results feature layers are always ordered on top of search graphics and point results are always on top of polygons.

Closes #97
Merge pull request #106 from agrc/polys

Polys