Update User.js

Display given health, in user stats
Merge pull request #317 from Yahkob/optimization

optimization(public): switch all resources to dataURI and/or spritesheet
Merge pull request #318 from Yahkob/optimization

addFile(img): add spinner to local files
Merge pull request #319 from Yahkob/optimization

optimization(miscCSS): add height/width gif to avoid DOM Repaint
Merge pull request #300 from xhochn/patch-1

Update User.js
Update README.md
optimization(freelancerHelper): listen on body for clicks instead of element