help with help. explain how help works

[dominictarr]

there are lots of help.js in each plugin now, but @corlock asked me how that worked, and where that should be documented. muxrpcli is the entry point for that, so this should probably describe how to add a help method.

see also https://github.com/dominictarr/muxrpc-usage

[corlock]

@dominictarr , see here: https://github.com/dominictarr/epidemic-broadcast-trees/issues/24#issuecomment-475829798

You need @clevinson

[stale]

Is this still relevant? If so, what is blocking it? Is there anything you can do to help move it forward?