Merge branch 'replaceGetSetScene' into singleSceneEntry
private context
Use RGB textures for imagery without alpha.

Currently only Bing imagery claims to not have alpha.
Update CHANGES.md.
Merge remote-tracking branch 'origin/master' into noAlpha
Merge branch 'master' into singleSceneEntry

Conflicts:
	Source/Scene/SceneTransitioner.js
	Source/Widgets/HomeButton/HomeButtonViewModel.js
remove context from camera, billboard and scene transforms
createTextureAtlas, sandcastle
Merge branch 'master' into singleSceneEntry
update CHANGES.md
Merge remote-tracking branch 'origin/master' into noAlpha

Conflicts:
	CHANGES.md
Add specs for hasAlphaChannel property.
Merge remote-tracking branch 'origin/master' into noAlpha

Conflicts:
	Specs/Scene/SingleTileImageryProviderSpec.js
Merge branch 'master' into singleSceneEntry

Conflicts:
	CHANGES.md
cleanup
Merge pull request #1590 from AnalyticalGraphicsInc/noAlpha

Optimization for imagery providers without alpha channel
Merge branch 'master' into singleSceneEntry

Conflicts:
	CHANGES.md
Merge pull request #1610 from AnalyticalGraphicsInc/singleSceneEntry

Make scene.context private
Merge branch 'master' into issue1462

Conflicts:
	CHANGES.md