Add Leaflet.draw 0.2.2

Using files from https://github.com/Leaflet/Leaflet.draw/tree/0.2.2/dist

Changed naming convention from that of dist to reflect cdnjs norms (Leaflet uses leaflet.draw-src.js for unminified and leaflet.js for minified). The dist doesn't provide minified CSS so I minified those files using the http://refresh-sf.com/yui/ compressor.

This PR should address issues discussed in #1476.