Added Leaflet.Draw Library

Just dl'd and unzipped the Leaflet.Draw GitHub repo into our project.
Will be adding relevant code shortly.
Leaflet.Draw Includes

Added a script/stylsheet link in the head of map.html for Leaflet.Draw.
Also changed the test text in the sidebar just because it's annoying and
needlessly lengthy in the code.
MapApp.js now has Leaflet.Draw

Included a block of code at the bottom of init() to make the appropriate
Leaflet.Draw control and put it on the map. Currently we can just draw
things on the map and edit them. I will need to research/work further to
actually start doing things with Leaflet.Draw now.