minor refactor to `BandangoPusher`
schedule `SaniGetWorker` on `#initialize!`
hide private methods
hide private methods
do not use cache on test environment
fetch models async (client side)

add `Bandango.AsyncModelRouteMixin` to fetch models async

usage via `asyncModel` property in routes
remove namespace from sidekiq config

sidekiq will ignore it. This is set via an initializer
remove errbit and use sentry
simplify syntax
Merge branch 'master' into heroku