Item descriptions

[encratite]

The descriptions are already available in the LeagueOfLegends.js database, they are just not being used right now. It's probably not that much work to add popups to the items in the match history.

Just make some <div> DOMs with visibility: hidden and some background-color and then render them with on-mouse-over events with a slight offset from the user's cursor position.

[gradiuscypher]

I'd like to tackle this issue.