Add saturation adjustment to imagery layers.
Add hue adjustments to imagery layers.
Update CHANGES.md.
Merge branch 'master' into hue-saturation

Conflicts:
	CHANGES.md
Tweaked CHANGES.md
Merge branch 'master' into hue-saturation

Conflicts:
	CHANGES.md
Specs for DynamicMaterialProperty

Fixed a bug where it would call a non-prototype function on a prototype object.
DynamicMaterialPropertySpec should be in the WebGL category.
Merge remote-tracking branch 'origin/master' into czmlMaterials
Merge pull request #478 from AnalyticalGraphicsInc/czmlMaterials

Specs for DynamicMaterialProperty
Fix ray-ellipsoid intersection when the ray origin is inside the ellipsoid. Modified both the GLSL and Javascript functions.
Merge branch 'master' into hue-saturation

Conflicts:
	CHANGES.md
Only add image processing code to the central body shader if the imagery layer properties change.
Merge pull request #480 from AnalyticalGraphicsInc/rayEllipsoidIntersection

Ray-Ellipsoid Intersections
Fix AMD test failure.
Merge pull request #483 from AnalyticalGraphicsInc/testFailure

Fix AMD test failure.
Merge pull request #456 from AnalyticalGraphicsInc/hue-saturation

Hue and Saturation
Fix globe rendering on the Nexus 4 in Google Chrome beta.
Updates CHANGES.md.
Merge pull request #485 from AnalyticalGraphicsInc/nexus4

Fix globe rendering on the Nexus 4 in Google Chrome beta.