I really, really want to add support for plugins/extensions to support custom data visualizers, but it still needs a bit of work on the web client side, mainly

I really, really want to add support for plugins/extensions to support custom data visualizers, but it still needs a bit of work on the web client side, mainly some code cleanup and some new ui functionality, and possibly a bit of work on the server side for easier message receiving. I'll definitely add the plugin functionality for the next version. You can send me a pm/email to discuss it further, so that I'll have a better idea on what kind of functionality you need for your custom visualizers.