Add more examples to the documentation

[shadow2560]

Is your feature request related to a problem? Please describe. I think you haven't enough complexes examples in the documentation, for new users it's not easy to realy understand how advanced features work (especialy custom commands and custom bbcode witch are probably the most used things).

Describe the solution you'd like Adding more examples like creation of menus dropedown with custom command, especialy without jquery (a good example could be with a modal dialog), if we look into the source code the menus couldn't be replicated because we don't have access to some functions like "on()" or "data()". The headers example could also be presented without the use of jquery, it could be a gooe example to. And a rewrite of the "img" commands and bbcode could be a good example to, for example to add the "alt" attribute to the params. With some examples it's more simple to use corectly the tool, personaly I'm not an expert in Javascript and it is a little frustrating; I've tried to search for some more example but I didn't find any except one or two in the issues but often in jquery.