Change MMM-CalExt2´s code a bit

[thetobyde]

Hey guys. I build my own “Apple” Mirror with MagicMirror.
I love the MMM-CalendarExt2 module but he uses Icons from iconify for each calendar.
Here is his module:
https://github.com/MMM-CalendarExt2/MMM-CalendarExt2

The icons look like this:

My Request:
Can you implement a option to use lokal pictures instead of icons from iconify? Then I could use these cute Memojis

Thx Melli & Toby