Major update.

cexpectimax is made with Cython to create an expectimax function that is fast can later be made multithreaded

removed expectimax.py, since it was deprecated by cexpectimax

depth.py and utility.py allows the easy manipulation of depth and utility to optimize game performance

seleniumagent.py uses Selenium to play 2048 in a Python controlled window, allowing for faster playing than webagent

refactored util.py and boxfinder.py to webutil.py and webboxfinder.py (web...py files can be ignored)

includes a local copy of 2048 web files so seleniumagent doesn't need internet access