Adding shoutbox feature for user pages and user's dashboard

@cgruppioni @chuckdisc

I also know that I'm using _path for many link_tos, but those are all placeholders until I actually use them. Also, wouldn't mind tips on what I should be doing with my divs, classes and ids + css.
Only @import(s) should be in this file.  Extract your CSS to another file and link to it here.