Replace with jQuery implementation
Not entirely sure that .on can entirely replace .addEventListener, but I'm assuming the event will bubble up
Add karma to each alternate user; add a timeout for moving mouse away
Caching and over-calling the API is still a major issue here--$.get caches calls (so karma isn't always up-to-date), and excessive calls are made, especially if the user does not use the account switcher
Encode the URI component
Add some left and right padding
Change loggedInUserInfo into a more multi-purpose getUserInfo
Allow usernames to be used (will be helpful for fetching the karma of alternate accounts)
Fully implement karma display, add new parameter to getUserInfo
Also various simplifications (for instance, removing redundant $ calls)