vscode-icons based on official Visual Studio Image Library
See: Custom icons support and offline icons support
In order to set your icons.zip uri you must open Preferences > User Settings and set this:
{
"vsicons.icons": "https://github.com/julianpaulozzi/vscode-icons-image-lib/icons.zip"
}
The default icons uri is http://github.com/robertohuertasm/vscode-icons/blob/master/icons.zip?raw=true.