Add C++ and update SoC

Merge pull request #5 from ielecer/clang

Merge pull request #4 from ielecer/numpy

Finish building mnist using numpy

Add class TwoLayerNet

Add layers with FP and BP to build NN

Correct numerical gradient algorithm

Crate workspace for building MNIST neural network with Numpy library

Train nn using numerical gradient method

Add test procedure for class TwoLayerNet

Combine array tranformation into matrix multiplication

Transform 1D array to 2D array

Add simple matrix multiplication

Create C workspace and test gcc compiler

Create Pytorch learning course by Morvan