版本：1.0.6
- https://cdn.bootcdn.net/ajax/libs/pell/1.0.6/pell.css
- https://cdn.bootcdn.net/ajax/libs/pell/1.0.6/pell.js
- https://cdn.bootcdn.net/ajax/libs/pell/1.0.6/pell.min.css
- https://cdn.bootcdn.net/ajax/libs/pell/1.0.6/pell.min.js
pell - the simplest and smallest WYSIWYG text editor for web, with no dependencies