Better Encapsulating for high level API

[Oceania2018]

We're going to add a new entry class named NumSharp. NumSharp will have our API more stable for high level usage. Just change NDArray implementation, better encapsulation of OOP, and more readable function names, trying to be as same as possible for NumPy.

var np = new NumSharp();
np.arrange(10).reshape(2, 5);

[Oceania2018]

I added C# NumPy bridge class. Try to keep function convention same as Python NumPy

var np = new NumPy<int>();
var n = np.arange(6).reshape(3, 2);
n = np.reshape(n, 2, 6);