text: Title: Clean up README.md
  Body: Some possible corrections:
  
  1. Say somewhere one needs to install pyyaml and import yaml
  2. In the first code snippet in 'Creating a login widget', replace `Loader=SafeLoader` by `Loader=yaml.SafeLoader` 
  
  Or something like that as I struggled to realize the above from the README.md. It may be obvious to a lot of folks but it was not to me.
  
  I could do it myself but I am hesitant as I don't want to interfere in your README. Package is great by the way! Thanks!