Added czm_modelViewRelativeToEye automatic uniform
Made UniformState functions prefixed with an underscore private
Added czm_modelViewProjectionRelativeToEye automatic uniform.
Updated CHANGES.md
Updated Changes.md
Added EncodedCartesian3 for GPU RTE
Update CHANGES.md
Removed context from UniformState
Added update function to UniformState to reduce number of stters
Added automatic camera uniforms to GPU RTE
Updated CHANGES.md
More doc and tests
Polyline GPU RTE in progress
Updated CHANGES.md
Added czm_translateRelativeToEye function
Merged master into polylineJitter
More doc
Polyline jitter fix in 3D.  2D and Columbus view not working yet.
Improved GPU RTE test
Interleaved high/low positions in progress