Add support for more spec-conforming TMS tilers.
Update Cesium to use new QuantizedMesh extension format.  In place of using a bitfield identifying the presence of an extension, all extensions must start with a unique id followed by a 32 bit length of the extension, followed by the extension bytes.  This new format allows for clients to skip over extensions that it does not know of or care to unpack.
clean pictures
Fix whitespace
Merge pull request #1983 from AnalyticalGraphicsInc/tms

Add support for more spec-conforming TMS tilers.
Updated unit test datafile defining a terrain tile that includes the oct-encoded extension data using the revised extension format.
Fix CZML Sandcastle example to work standalone.

The script tag was in the wrong place so I just had to resave it.
Merge pull request #1990 from AnalyticalGraphicsInc/fix-sandcastle

Fix CZML Sandcastle example to work standalone.
Merge remote-tracking branch 'agi/master' into quantizedMeshExtensions
Added two new unit tests to test QuantizedMesh tiles with unknown extensions defined.  The unknown extensionId is 200, which has not been assigned to any extension.
update geometry and appearances demos
update pictures
update descriptions
Merge branch 'master' into sandcastle-pics
cleanup
Merge pull request #1994 from AnalyticalGraphicsInc/sandcastle-pics

Scrub sandcastle examples
Merge pull request #1993 from abwood/quantizedMeshExtensions

Quantized mesh extensions
Update to joint patch for glTF 0.8
Merge pull request #1995 from AnalyticalGraphicsInc/gltf-8-patch

Patch for glTF 0.8