Cleaned up final code and added README

README.txt

+Project Author: Nathan Rossol, Computer Science sophomore at the University of Michigan
+
+Project Description: The program will solve a given 9x9 sudoku puzzle using a recursive and backtracking algorithm.
+		     Originally, this was implemented in C++, but was then moved over to Python in order to create
+		     a GUI using pygame. I included the C++ code due to this reason. 
+
+Python Version w/GUI Usage:
+	- Make sure you have the pygame module installed on your computer and run gui.py through your terminal.
+        - Ensure that gui.py and sudokuSolver.py are in the same directory!
+	- sudokuSolver.py will not run on its own since gui.py supplies the grid to be solved.
+
+C++ Version:
+	- Compile sudokuSolver.cpp with g++
+	- Type: ./{executable_name} {grid_num}
+	- grid_num is between 1 and 3 inclusive.
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