Javascript is not an essential part of web development. This tool is geared towards web pages rather than applications, where client-side scripting might play a bigger role.
Unfortunately (and with some good reason) there are still many people who use NoScript et al to browse the web without javascript.
>> Javascript is not an essential part of web development.
This is a very strong statement and I probably disagree. I am not talking about client-side applications here, but all those Google Analytics snippets, Facebook Like buttons, Discus comments etc. The script block essentially became a standard way to include third party functionality into the web page. And without it this tool is less useful than it could be.
How are you planning to deal with pull requests? i.e. will you require signing CLA (like dojo does http://dojofoundation.org/about/cla )? I assume you are not going to keep commercial and GPL codebases separate, so you need some kind of permission from the contributors that you can re-license/sell their code?
But the html editor is a really nice one :-)