Trigger popupopen/close on markers too.
Add tile bounds option to limit tile loading to a given region
fixed bug where wms tilesize option was ignored when setting
 wms params width and height
Rename TileLayer.options.tileBounds to bounds
Better parameter handling for TileLayer bounds
Use proper factory call for bounds option
determine button disabled state on baselayer change
remove handler too
Merge pull request #1372 from snkashis/zoom_with_layerswitch

Update zoom control buttons with proper state on baselayer switch
Allow popups that are bound to markers to have new content set
include conditional before trying to set content of popup
prevent false move events in invalidateSize
fire dragend before moveend for consistency
Merge pull request #1373 from snkashis/marker_popups

Allow popups that are bound to markers to have new content set
prevent extra movestart on inertia drag
Fire zoomlevelschange event when zoomlevels are updated.
This is triggered when you remove a layer from a map with greater
zoom level coverage than the remainding layers or when you add a tilelayer
with greater zoomlevel coverage than the previous set of layers had.
Add tests for the zoomlevelschanged-event.
Merge pull request #1374 from oslek/move-events

Move events
Don't expose getZoomLevels.
Merge pull request #1376 from moonlite/zoomlevelschange-event

Zoomlevelschange event