Merge pull request #72 from lossyrob/master

Move networking code from GeoTrellis core to Geotrellis Transit
Refactored SpatialIndex to fix a memory leak.
Merge pull request #73 from lossyrob/mem-leak

Refactored SpatialIndex to fix a memory leak.
Added swagger json docs as static files
Merge pull request #74 from lossyrob/swagger-readd

Added swagger json docs as static files