Zemfrog v5.0.1

• Flask-smorest integration. Based on #63 <https://github.com/zemfrog/zemfrog/issues/63>_
• Refactor Code: added scaffolding
• FIX: use 'alt_response' instead of 'response' to wrap multiple responses.
• FIX: configuration to enable / disable OpenAPI
• IMPROVE: no longer supports to load main urls
• IMPROVE: Add a command description to the sub application
• IMPROVE: use 'subprocess.call' instead of 'os.system'
• Change the name of the password reset request template
• create pyup.io config file