First cut at improved label outline support.
More label improvements.
Cleanup outline code

1. Partially revert Sandcastle example
2. Update CHANGES
3. Fix a failing test (by removing an uneeded check).
4. Update simple.czml to take advantage of improved outlines.
Hopefuly finally changes before pull request
Merge remote-tracking branch 'origin/master' into labelOutlineWidth

Conflicts:
	CHANGES.md
Specs for outlineWidth

Also fleshed out other missing LabelCollection specs to bring coverage up to 100%.  Fixed a bug in `LabelCollection.remove`
Remove `clampToPixel` after review disussion.
Merge pull request #565 from AnalyticalGraphicsInc/labelOutlineWidth

Label clarity improvements