Updated distance formula and added intersection query param
  TODO: add intersection rels to graph database
  TODO: refactor dir search to only use graph db
  TODO: update weights in grpah db
Added stat rake tasks
Re-seeded graph DB with new distances and weights
  TODO: Add intersection relationships
  TODO: Change path traversal to intersectional
  TODO: Remove AR from request process
Merge pull request #18 from jhulley/backend_rewrite

Backend rewrite