Initial SkiTracks commit
added SkiTracksVideos submodule
New icons
enabled slope overlay button
closer initial camera position
Merge branch 'master' of github.com:gbeatty/cesium into SkiTracks

Conflicts:
	CHANGES.md
	Source/DynamicScene/DynamicMaterialProperty.js
smooth camera flights
fixed initial slope overlay translucency
changed deer valley czml starting time
prevent double click
changed path trail time and outline
billboard scaling on hover
removed commented out code
adjusted track start time
move bing logo
add slope tiles as submodule