Analytics plugin first pass

OK, I think this is ready to merge for-realz.

Analytics plugin for ubersystem, should be able to drop in for both AC and Magfest no problem.

This is also the first real UI-heavy, database-heavy plugin to be used and those functionalities all seem to work well, which is awesome.

This displays graphs of paying attendance. Excludes: paying dealers, comp'd staff/vip/guest/etc badges, refunded badges.  We want to know how many badges were purchased by the actual general public.

Off the shelf, this plugin displays only the live registration data on a graph (which, is the main point and is super-useful).

However, if you have historical data, you simply drop a json file with the old data in a particular dir in your deploy, and it will merge that with the live data.

There's a few hacky things here (i.e. ANYTHING to do with UI design, responsive, making it look pretty, CSS, etc because I have no patience for that).

@EliAndrewC I'd appreciate a good hard look at my __init__.py to make sure I'm not doing anything too dumb in there with mounting the app config/etc.
CSS is awesome.  It makes it easy to do anything you want.  Unless you have some kind of really weird requirement that no one would reasonably ever have.  Like being able to vertically center something, which remains beyond the ability of most programmers to reliably accomplish even in the year 2014.