Added Sudoku.py

[juhanfreitas]

Adds a python algorithm that handles sudoku grids. It will generate random sudoku grid if you want to solve it; after finishing, you can just reveal the answer using the resolution function.

Closes issue #36

Put a little bit about how you made what you made

It's a python algorithm that uses backtracking to solve sudoku puzzles. To generate a new sudoku grid, it will "solve" an empty grid and choose random spots to turn into blank spaces.

Tag the issue you made here:

My issue number is: 36

[juhanfreitas]

Forgot that it needs to be assigned to me, so you just need to delete it and i will start over.

[Atharv-Attri]

It's fine, I can still merge