Filtering by unreachable nodes for list command
Fixed graph creation edge weight bug
Fork new process from sbt for execution.
Add *.pyc to .gitignore.
Optimize generation of shortest path tree.

This commit disables the caching of individual shortest paths,
and changes the per execution array creation to a Array.copy invocation.
Merge remote-tracking branch 'origin/master'
Seperated out transit and walking graph contexts.
Merge pull request #1 from joshmarcus/topic/spt_optimization

Optimize generation of shortest path tree.
Raster service improvements
IDW for raster generation.
Fixed unit test, add sliders on client
Merge pull request #2 from joshmarcus/topic/raster_generation

Update project to current state of development.
Add JRebel support.

If you set a JREBEL_HOME environment variable to the directory with
jrebel.jar, sbt will now load JRebel into the JVM.  This checkin
also includes an sbt plugin to generate jrebel.xml.
Add jrebel plugin.
Merge pull request #3 from joshmarcus/topic/jrebel

Add JRebel support.
Add update-jetty sbt task to automatically reload resources.

~update-jetty will continuously copy new resources as well as recompile.
This commit also sets jetty autoload settings so that static files can be
edited in place and immediately reloaded.
Merge pull request #4 from joshmarcus/topic/jetty-update

Add update-jetty sbt task to automatically reload resources.
Add scaffolding for REST services and REST service documentation.
Add /nearest_vertex service.
Fixed bug in OSM parsing\graph building