fix package.json, gitignore file
add cocos2d-js-v3.1-lite
cocos2d enabled player movement and animation

previous squashed commits:

test cocos 2d project
update gitignore to ignore cocos2d framework and resources
cocos2d: replace hello world with 'Parkour' demo
cocos2d: fix demo (undefined staticbodies)
another test cocos2d project, updated gitignore
animate (poorly) an elephant walking across the canvas
initial player animations and movement
player movement, server side
remove tutorials