Rollover for user info and follow button.
目前為
Mouse over a username in any post or in notifications to get a popup showing that user's bio info with a quick link to follow/unfollow.
Compatible with both the default theme, and my Dark Theme, note that you will need to refresh the page if you switch between themes.
--Changelog--
added half-second timer so the popup doesn't come up immediately and get in the way (11/14/2016)
Added mouseover effect for users in Search and Popular section. (11/13/2016)
