added skeleton for Setup Wizard
Merge branch 'devel' of github.com:globaleaks/GLClient into devel

* 'devel' of github.com:globaleaks/GLClient:
  added skeleton for Setup Wizard
Implement first start wizard.
Add crypto utils functions.
Redirect to wizard page if unconfigured.
Merge remote-tracking branch 'origin/feature/setup_wizard' into devel