added L.UtfGrid class factory in Leaflet 0.4 style
Merge pull request #15 from rdmurphy/leaflet-class-factory

added L.UtfGrid class factory in Leaflet 0.4 style
Reset cursor when layer is removed

This fixes a bug that occurs when you remove a layer with pointerCursor: true, and the cursor doesn't revert back.
Fix typo
Merge pull request #20 from bmcbride/master

Fix typo
Merge pull request #19 from bmcbride/patch-1

Reset cursor when layer is removed
Only reset pointer if we were in control of it.
Update build
Don't crash if we get empty grid data from the server. fixes #21
use osm tiles instead of cloudmade. Update used leaflet to 0.7.2