New Leaflet control: Credits

Lately, I've been polishing up more of these old Leaflet Controls that I've created over the last year. Here's another one.

https://github.com/gregallensworth/L.Control.Credits

This one's pretty simple: supply text and a URL and an image, and it generates a cute interactive icon in the lower-right corner. There are various ways to make credits in your Leaflet map, this is the one used by GreenInfo Network and it's quite nice.