don't fatal if unable to log rake tasks
email configuration is now read from .env
don't read from bandango.yml anymore. use .env
read pusher config files from .env
use $PORT in Procfile's web
read secret_key_base from .env
support external redis host via env

`ENV["REDIS_HOST"]`
make `db:dummy` invoke `db:seed`
minor changes to log messages
`db:dummy` doesn't invoke `db:seed` anymore

Invoking `db:seed` just before `db:dummy` makes a lot of queries to the database.
This is a problem in heroku's dummy environment because the free database plan limits the number of queries the app can execute
logout a user if the user has been removed from DB

fixes a bug where you would see a 404 rendered when your user was
removed from DB
add a default for `CashDenominationItem` `cantidad`
minor refactor to `CierreCaja`
`db:dummy` now creates cierres de caja
better handling of unauthorised user requests
handle client-side session when user is removed from DB

add `logOut` to `sessionController`
add `bandangoUnauthorizedHelper`
changed error message when login failed