filter out the last point of a polygon to account for GeoJSON compatibility
overlay events
rename events
TileLayer.Canvas.redraw() now returns this.
Merge pull request #1286 from calvinmetcalf/layerControlEvents

Layer control events for overlays
Merge pull request #1287 from jieter/master

TileLayer.Canvas now returns this.
update changelog, bump version
merge snkashis polygon fix
update changelog
update build