Minor cleanup.
Updated Billboard sandcastle example.
Merge pull request #1326 from AnalyticalGraphicsInc/svgPathBindingHandler

Remove SvgPath in favor of a Knockout binding handler.
Merge remote-tracking branch 'agi/master' into offsetByDistance

Conflicts:
	Apps/Sandcastle/gallery/Billboards.html
	Apps/Sandcastle/gallery/Labels.html
	CHANGES.md
Minor cleanup.
Merge pull request #1324 from abwood/offsetByDistance

Offset by distance
Fix code highlighting in CHANGES.md
Merge remote-tracking branch 'origin/master' into matrixfunctions
Merge remote-tracking branch 'origin/master' into gltf
Merge branch 'gltf' into gltf-dev3
whitespace, rename vars
Fix model test app after merge
Merge branch 'gltf' into gltf-dev3
Merge branch 'master' into inspector

Conflicts:
	CHANGES.md
	Source/Widgets/CesiumWidget/CesiumWidget.css
	Source/Widgets/Geocoder/Geocoder.css
	Source/Widgets/Geocoder/Geocoder.js
	Source/Widgets/Viewer/Viewer.css
Handle CZML availability with multiple intervals.

`DynamicObject.availability` is now a `TimeIntervalCollection` instead of a `TimeInterval`.  The availability property is still always replaced when a new availability is provided, no merging happens.
Merge remote-tracking branch 'origin/master' into dynamicObject-availability

Conflicts:
	CHANGES.md
Update CHANGES.md

`DynamicObject.availability` update is a breaking change.
Remove unecessary if checks.
Updates from review.
Merge branch 'master' into cameraEvents

Conflicts:
	CHANGES.md