Editor test site

I have to admit, I did not use any other editor than TinyMCE yet. Although I *believe* it is the most advanced in terms of configuration and integration, we need to compare the features and actual implementations of all editors to find overlapping (duplicated) code and to create usable API hooks.

Thus, I'm thinking of an editor test site using Demo module. Due to current limitations of all editors, I guess this needs to be a multi-site setup that serves one editor on one subdomain, e.g. tinymce.example.com, or, using subdirectories, example.com/tinymce/.