Add Ukrainian (uk_UA)

Update Leaflet.editable

First shot in switching from leaflet.draw to Leaflet.Editable

We still ship leaflet.draw because it's needed for Leaflet.MeasureControl,
let's change that in the future.

Update submodules

Update Leaflet to 0.6.2 \o/

Update Leaflet submodule

Bump to 0.2.0