Begin converting to Windows forms UI.

Start converting the UI from XNA to a normal Windows form to allow code
to compile to x64.
Recreate graphics on the form.

Implement the graphics to match the XNA version but with a white
background and rename the Form1 class to Connect4Form.
Add UI controls and finish converting from XNA.

Allow the AI and the human player to make moves again.
Move drawing code out of Board class.

Move the drawing and other methods to the Window class, so the board is
independent of the display.
Add the end result of the game to the log file.
Print the runtime of each iteration.
Write all logs to common folder and add to TODOs.
Switch to the simpler NegaMax algorithm.