版本：0.6.0
- https://cdn.bootcdn.net/ajax/libs/pell/0.6.0/pell.css
- https://cdn.bootcdn.net/ajax/libs/pell/0.6.0/pell.js
- https://cdn.bootcdn.net/ajax/libs/pell/0.6.0/pell.min.css
- https://cdn.bootcdn.net/ajax/libs/pell/0.6.0/pell.min.js
pell - the simplest and smallest WYSIWYG text editor for web, with no dependencies