A few months ago, I finally upgraded to Felix's version 8 gateway. In doing so, I commissioned my daughter, and the Lead graphics designer of Flymake:
http://www.flymake.com. to create additional icons that go along with the devices that I am using the Moteinos for.
Here is a link to the additional icons - feel free to use them as you like.
https://drive.google.com/open?id=0B8J5EZSWdiZtOWs3NVJZdWVpazQThere is also a zip file with all of them as well.
To implement them, just copy them to the /home/pi/gateway/www/images directory.
Then edit the metrics.js file. Here is an example:
SolarPanel: {
label : 'Solar Panel',
icon : 'icon_solarpanel.png',
},
Then just restart the gateway with a "pkill node"
Go to the node you want the Icon for, and in the "Type" drop down you will see the new icons. Select and go!