Proofread Easy and Widgets Documentation

  * Move Easy index page to Easy documentation directory
  * Fix typos in Easy documentation
  * Move Widgets page inside its own folder
  * Fix typos in Widgets documentation
Add link to edit documentation pages on GitHub
Change edit_link to generate link to view file on GitHub

Direct link to edit a file on a GitHub repo, forces you
to fork that repo. It's better to let user decide whether
to fork and contribute or not.