Initial commit to add support for 32 bit index buffers in Terrain Tiles.
Adjusted ambient lighting to brighten scenes that use terrain vertext lighting.
Merge branch 'terrainIndices32bit' of https://github.com/abwood/cesium into terrainIndices32bit
Cleanup.
Added unit tests for testing Quantized-Mesh tiles with 32bit indices.  Minor cleanup.
Merge remote-tracking branch 'agi/master' into terrainIndices32bit
Updated Changes.MD.  Merged in agi/master
Added IndexDatatype.createTypedArrayFromArrayBuffer.  Using this new method and the original IndexDatatype.createTypedArray throughout.
Cleanup.
Updated unit tests to use waitsForPromise where appropriate.
Unit tests for IndexDatatype.createTypedArrayFromArrayBuffer
Clean up use of primitives.add in Sandcastle examples
Unit test polish.
Merge remote-tracking branch 'agi/master' into terrainIndices32bit
Merge pull request #2189 from abwood/terrainIndices32bit

Add support for Quantized-Mesh terrain tiles with more than 64k vertices
Merge pull request #2191 from AnalyticalGraphicsInc/primitives

Clean up use of primitives.add in Sandcastle examples