SEISMICDESIGN-189: Edit links for Documentation
Changed documentation link in summary tabs.
SEISMICDESIGN-187: Convert region-specific red map overlays to layers that can be toggled on/off
Merge pull request #19 from aanderson-usgs/SEISMICDESIGN-189

SEISMICDESIGN-189: Edit links for Documentation
Added layerControl to RegionController object.
Changed access to GlobalMapView._layerControl to use GlobalMapView.getLayerControl() instead.
Changed references for GlobalMapView._map to GlobalMapView.getMap()
Merge pull request #20 from aanderson-usgs/SEISMICDESIGN-187

SEISMICDESIGN-187: Convert region-specific red map overlays to layers th...
Pins divided into different layers.
Pins only show data that corresponds to the layer they're on.
Added Leaflet.GroupedLayerControl plugin, modified app to use it, and added radio button functionality to plugin/app.
Resolved errors in jshint.
Fixed style.
removed trailing whitespace.