Make upgrades?

[GLivshits]

Hello. I'd like to say that this repository could be a piece of gold in a DL society. Unfortunately, you have not implemented quite basic operations, like sum along axis, simple scalar and broadcast operations (not all of them are implemented). And even some version-based naming is not handled (like moving_mean vs running_mean for batchnorm in mxnet). Please do something about that. I think people even would pay some money for conversions.