Reimplmented hexagon tile drawing using paper.js

I gave Easel.js a go tonight, but then switched to using Paper.js instead.

I've heard good things about Easel.js, but instead found it needlessly complex in certain areas, and their online docs contain deprecated methods. Basic functionality (players taking turns tracked in Javascript, the 2D array holding the game board state, red/blue tile color) is back, but things look much nicer in Paper.js.