Reorganize build output.  Add buildModuleUrl.

This is the first step towards automatically locating assets and widget resources.

Conflicts:

	Apps/Sandcastle/gallery/Standalone CZML.html
	Apps/Sandcastle/gallery/Standalone Demo.html
	Apps/Small Demo.html
Update CHANGES.
Merge branch 'master' into assets
Move changes to b13.
Merge pull request #467 from AnalyticalGraphicsInc/assets

Reorganize build output.  Add buildModuleUrl.