Fix combining multiple geometries that both have and have not been split by the IDL. Also, fix the quick bounding sphere reject when splitting by the IDL.
Fixed endianess of VertexNormal extension size.
Delimit extensions with a hyphen in the accept header.
Merge remote-tracking branch 'agi/master' into quantizedMeshExtensionsFix
Added a comment to explain the workaround for switching to octvertexnormals.
Merge branch 'master' into geometryPipelineBugs
Remove getTileDataAvailable backwards compatibility
Fix typo
Compute the model matrix for 3D only scenes that have an instance and primitive model matrices.
Merge pull request #2301 from AnalyticalGraphicsInc/scene3DOnly

Fix 3D only scene Primitive model matrix
Merge pull request #2300 from AnalyticalGraphicsInc/getTileDataAvailable

Remove getTileDataAvailable backwards compatibility
Fix #2302
Merge pull request #2291 from abwood/quantizedMeshExtensionsFix

Quantized mesh extensions fix
Fix per instance attribute indexing when geometries are split by the IDL.
Merge pull request #2289 from AnalyticalGraphicsInc/geometryPipelineBugs

Fix GeometryPipeline bugs
Fix billboard aligned axis.
Merge pull request #2303 from AnalyticalGraphicsInc/billboardAlignedAxis

Fix billboard aligned axis.
Update Cesium version.
Merge remote-tracking branch 'origin/master' into display-condition