Disallowing unauthenticated users to log in to strano

Now only github accounts that belongs to 'citysafe' organization can
login into strano. Also added possibility to run task without gui. For
this purpose is need send post request like
http://example.host.com/projects/123123/jobs?no_gui=true&task=airbrake:deploy&stage=staging_dp&branch=master
Merge pull request #2 from Hirurg103/master

Implementing possibility to create task without GUI with basic authentication. Disallowing unauthenticated users to login to strano