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stable release April 5, 2019

Merge pull request KhronosGroup#1717 from jeffbolznv/getBufferReferen…

…ceAlignment

Move getBufferReferenceAlignment to be a method of TType

stable release February 8, 2019

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Merge pull request KhronosGroup#1523 from sparmarNV/fix-SPV_NV_mesh_s…

…hader

Allow redeclaration of builtin interface blocks in mesh shader

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