Compression is most expensive in terms of time; if we detect
early that there are no changes between oldSrc and newSrc, lets
return early and skip the compression.
Change-Id: Id3d7c1d4bf89a33819907ff735e01629581627a3
Draw is a plugin that adds support for drawing and editing vectors and
markers on Leaflet maps. This will be used to create selections on the
document.
Source code: https://github.com/Leaflet/Leaflet.draw
Licence: MIT
