More than one object can occupy a space now. Broken
Fixed issue where pacman's previously occupied space would not clear in the next update cycle
Fixed ghost movement. It will no longer remove dots when moving across the map.
Refactored index.js to use an associative array to store ghosts instead of a single property
Renamed index.js to game.js and public/demo.js to draw_game.js
Added other 3 ghosts. Changed tpl/page.jade javascript references to the new js names