Add QuickSort Algorithm

[decon-harsh]

Add Quick Sort
Three Way Quick Sort
Tail End optimisation for Quick Sort

with code and proper explanation

[sugatobagchi]

Hi.

I would like to work on this issue. Can you please assign it to me?

[decon-harsh]

@sugatobagchi yours

[sugatobagchi]

@sugatobagchi yours

On it!