Update example to work with Leaflet 0.4
Update example to work with Leaflet 0.4

Override default CRS scale with defined function.
perliedman/Proj4Leaflet,perliedman/Proj4Leaflet,kartena/Proj4Leaflet,emacgillavry/Proj4Leaflet,SeaAroundUs/Proj4Leaflet,SeaAroundUs/Proj4Leaflet,kartena/Proj4Leaflet,kartena/Proj4Leaflet,emacgillavry/Proj4Leaflet,semone/Proj4Leaflet,semone/Proj4Leaflet,azavea/Proj4Leaflet