Feature request, print messages with colors

[staviq]

This a very simple modification, for starters, warnings in yellow:

var WARN = function(msg)
{
//console.warn('[WARNING] ' + msg);
console.log('\x1b[1m\x1b[33m%s\x1b[0m', '[WARNING] ' + msg);  //yellow
};

There is a nice and handy reference for console colors: https://stackoverflow.com/a/41407246