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
Allow clicks to pass thru non clickable paths
Allow previously created popups to be used with bindPopup
Don't fade in a currently shown marker popup
Merge pull request #1386 from snkashis/click_while_open

Don't fade in a currently shown popup when clicking marker again
Merge pull request #1385 from snkashis/bind_popup_option

Allow previously created popups to be used with bindPopup
Merge pull request #1384 from snkashis/svg_clicks

Allow clicks to pass thru non clickable paths
Note about line endings in the contributing guide
TileLayer opacity fixes as per @javisantana in #1371. Fixes #1084
Merge pull request #1396 from danzel/oldie-fixes

Fix TileLayer opacity in IE7/8