added the cumulatif of % column into the profile mode and made the column a little bit more aligned.

This happen when an op return many output and some of them are just ignored.

Updated the interface and documentation of scan following James suggestions; I also implemented a map function using scan

We should fix the real reason. I make a patch as this was making the CrossentropySoftmaxArgMax1HotWithBias op not being inserted as a stabilization.

duplicated verify_grad

implemented yet