refactored files into util and tests folders
* modified testing code - needs to change to an actual unit test without adding states as in the main program
* refactored qqwing code to separate folder
- provides more examples for testing purposes
* added level1-4 examples for consistent testing
* ran test for sudoku test level1-4 with 10 iterations
* added testing module that calls the sudoku_main.py
* removed unnecessary prints
* refactored file to accept user input if no arguments or a string filename as input to main
* inform user of too many input arguments
Update README.md
Update README.md
Update README.md
Update README.md
* moving testing script to parent directory
Merge remote-tracking branch 'origin/austin' into austin
* moving testing script to parent directory