Add mboTensorOpMatVec test for sum of operators.
Add note regarding aliasing in mboTensorOpMul.
Add test for mboTensorOpMatVec with operator s_-(0) * s_+(1).
Add simple test for applyElemOp.
Add mboVecSetRandom method.
Add --output-on-failure option to ctest.
Add test for applyEmbeddings with one embedding.
Bug fixes in applyEmbeddings.

All applyEmbeddings tests pass.
Fix expected result in one of the MboTensorOp tests.