when the 1msigmoid optimization is not registered.

can be unpickled properly even though Gemm has an 'inplace' property now.

Add parameter 'inplace' to Gemm Op.
Alias gemm_inplace to Gemm(inplace=True) and gemm_no_inplace to
Gemm(inplace=False).
Replace calls to 'gemm' in GemmOptimizer by calls to gemm_no_inplace.

If True, won't print the intermediate var that don't have name.

instead created setsubtensor function. Also added python and rst documentation.

internal use.  I created a new Alloc() Op that is used for fill-lifting
Optimizations.

specialization.  It inserts a new op called PseudoGemm.  This Op has the same
signature as Gemm but does not work inplace.   Another optimization comes
later in the pipeline and swaps PseudoGemm for Gemm

An Env feature persists throughout the life of the env, so many optimizations
can take advantage of the Shape analysis done by ShapeFeature.

exact output from the rngs, the float32-casted sampling bounds mess things up.