Using CONSTANT_CASE for geometry type
Using PascalCase for geometry enum values

This adds a bit more inconsistency to the library, but we didn't have complete consistency before.  Almost all existing string enum values are lowercase (a couple are camelCase and one is dash-separated).  The closure library isn't consistent either (with case for enum properties or values).  I imagine this could be justified in saying someone could blindly use GeoJSON type values in places, but in the end, you'll need to read the docs before guessing right.
This commit serves no purpose other than helping minimize a diff
Marking the geometry type enum as stable
Add ol.MapBrowserEvent#getBrowserEvent
Merge pull request #1335 from tschaub/geometry-type

Change geometry type enum and mark as stable.
Avoid firing duplicate change events in ol.layer.Layer
No need for handleLayerChange in base layer
Avoid duplicate change event on visibility change
Remove unused handleLayerVisibleChange
Test change events on layer groups
Merge pull request #1349 from tschaub/fewer-change-events

Clean up layer change event handling.
Add gutter option to ol.source.TileWMS
Add gutter support to TileUrlFunction
Add ol.source.Tile#getGutter
Add gutter support to ol.renderer.canvas.TileLayer
 Add gutter support to ol.renderer.dom.TileLayer
Add gutter support to ol.renderer.webgl.TileLayer
Add missing "new"s in ol.structs.RBush
Merge pull request #1364 from twpayne/rbush-new-error

Add missing "new"s in ol.structs.RBush