Resolves an issue where the map slider was not appearing
Merge branch 'feature/mapbox'

* feature/mapbox:
  Map now resets to default on second load
  Adds clear selection button to the map
  Moves the two add on buttons to the scope
  Clicking on elements now highlights it and associated elements
  Refactors o'clock events out of the event listeners
  Map now displays path info in sidebar
  Fixed me accidentally creating syntax errors. Shading still broken
  Removed unneeded for loops that were slowing down the transitions. Considerably faster now.
  Moves marker popup data to a sidebar. BREAKS Map clicking hiding other elements
  Fixed a spelling error and removed code for a mini-map preview that was defunct
  Clicking on markers now highlights respective paths and vice versa
  Adds a debounce to the leaflet to attempt to optimize
  Clicking on a path or marker on the map now emphasizes it
  Fixes a bug in the angular-leaflet where changing the opacity in the scope would not modify it on the map
  Map lines are now displayed using the leaflet directive
  Art now grabs PVID value from dataset
  Map markers now use the angular directive
  Fixes a location generation bug with the art data