v0.20.5

• NDArray.Indexing: Rewrite of the getter mechanism, NDArray getter now supports combining 'NDArray, Slice, string, int, bool' in the same slice.
• NDArray.Indexing: Added support for indexing with unmanaged array of indices: ndarray[int* pointer, int length], nd.GetData(int*, int), etc..
• NDArray.Broadcasting: fixed multiple issues.
• NDArray.Slicing: Added support for slicing a broadcasted NDArray.
• Added NPTypeCode.Float as an alias to NPTypeCode.Single
• Extending NPY and fixing NPZ (Thanks Matthew Moloney)
• Added NDArray.AsOrMakeGeneric()
• Added np.nonzero. np.maximum, np.minimum, np.all, np.any
• Arrays.cs: perf-optted Arrays.Slice
• NDArray.FromMultiDimArray: Fixed #367
• np.clip: Added @out argument
• Added np.array(IEnumerable) and np.array(IEnumerable, int size) which is faster.
• np.broadcast_to: added additional overloads.