Added text option for number-display

This will allow users to set the text attached with a number-display. (TO DO) Pluralization of text, (https://github.com/blakeembrey/pluralize) can be helpful.
I understand now.  But please use `===` so that we can be sure it doesn't have unintended effects - for example `''==0` returns true, and I don't even want to think about the rest of the bizarre `==` rules.