Request: Allow more than one label per element

[jspautsch]

It would be fantastic if I could use this plugin to add multiple "labels" per element. Since I can put any HTML I want in them, I could use it for glyphs or other iconography. Problem is right now the array of selectors overrides the previous.

Perhaps if they were keyed by ID and position. e.g. each element can have one center, one left, one right, etc., but not two on the exact same position (e.g. bottom center).