Merge pull request #13 from jhulley/legacy_cleanup

Legacy cleanup
Added rails 12-factor to gemfile, updated readme
Removed local config for neo4j
Moved neo config to graph.rb model
Updated README
Added multiple weights to neighbor relationship
  Added multiple degrees of safety to provide option for user
  Reseeded graph database
  TODO: add multi-path handling functionality to client-side
Added slider for safety variation
  TODO: link safer and shorter buttons to slider
  TODO: format slider on mobile
  TODO: have slider toggle map view
  TODO: create multi-paths for map and display first one
Safe/Short buttons move slider
  TODO: link slider value to map overlay
  TODO: hide slider on initial page load
Added method to show path on map per slider position
  TODO: rewrite response from server to fit overlay schema
Multi-weighted paths can be seen via slider
  TODO: style for mobile
Slider bar styled for mobile
Merge pull request #14 from jhulley/multi_weight

Multi weight
Added rails_12factor for heroku logging
Fixed overflow on search form
Fixed slider button styling for mobile
Added direction search toggle on response
Added loading icon during ajax request
Added styling to error messages
Merge pull request #15 from jhulley/mobile_styling

Mobile styling
Fixed error message height on resize