Compress Primitive texture coordinates.
Fix texture coordinate compression when a coordinate was equal to 1.0.
Rename compressNormals -> compressVertices.
Fix tests.
Add test for compressed texture coordinates.
Re-map Rectangle texture coordinates to be in [0.0, 1.0].
Rename Oct -> AttributeCompression.
Factor out texture compression.
Add tests.
Merge pull request #2220 from AnalyticalGraphicsInc/compressST

Compress Primitive texture coordinates