Examples files.
Use proper function name.
Remove initialize function.
Switch to ordinary GeoJSON layer.
Extend L.GeoJSON properly this time.

Well, that's the intention.
Default popup content.
Missing right curly brace.
Default popup content when there are no options.
Initialize options if not provided.
Test for undefined options.
LABEL, not NAME.
Brief description added to readme.
Remove demo from master.