OH GOD, THIS DIDN'T NEED TO BE A RAILS APP
add spec files back in
added factory_girl to spec_helper
added app.rb
added histogram class back in
removed source_ts from histogram factory
added username accessor, replaced sum (rails-only) with inject
replaced FactoryGirl.create with .build

otherwise it would try to call 'save!', which doesn't exist
by default in sinatra
hacked histogram specs into passing again.

oh god, fix all this
added sinatra_param gem
raise error in histogram#initialize for model validations
fixed up controller spec and logic
added assets back in
added histograms.coffee back in
double quotes
fixed home link
use Bundler.require
fixed 404 on getting stylesheet
removed error log from repo

wtf
unescape assetpack css/js calls