Add basic infobox, begin refactor w/ sigInit and css changes

Basic but ugly infobox support has been added, displys name, profile picture (with href to profile page), and location if supported.

CSS changse in jquery migrated to style.css (and may be transferred into sigma)

We need to start refactoring the code. A lot of mixture between anonymous functions vs declared functions, which don't logically make much sense...and perhaps split up app.js into app and sigma parts?

1. Commented out is a function taken from sigmajs.org that will provide neighbor arrays..bind to onclick. Neighbor function has been added in sigInit

2. keep overNode flag when moving to infobox div

3. Make infobox show up quicker and disappear quicker

This build is currently on the server and is functional. It's just a bit messy at this point.