add Internal-Server-Error, adjust some logging levels
implement InternalServer Error for errors of bcrypt
create module out of create_session, bring back json-responses for errors, refactor user.login to make use of CRUD-UPDATE & extended CRUD-UPDATE with read-hook
do not overwrite .stack-option, but just set of for non dev-enviroments
set default lentgth for session hashs
add a bit of documentation & todos to user-model, logout: delete cookie after the update call
implement CRUD for Role
moved database options out of app.coffee
define the api base, to not send wrong response types, fix some errors, which occur, when no models where found