Make cutpastable version

[jeromeetienne]

• much easier to include
• no dependancy

[jeromeetienne]

here is what i did. only 19 line btw :)

// add microevents.js - https://github.com/jeromeetienne/microevent.js
(function(destObj){
    destObj._events = {};
    destObj.bind    = function(event, fct){
        this._events[event] = this._events[event]   || [];
        this._events[event].push(fct);
    };
    destObj.unbind  = function(event, fct){
        if( event in this._events === false  )  return;
        this._events[event].splice(this._events[event].indexOf(fct), 1);
    };
    destObj.trigger = function(event /* , args... */){
        if( event in this._events === false  )  return;
        for(var i = 0; i < this._events[event].length; i++){
            this._events[event][i].apply(this, Array.prototype.slice.call(arguments, 1))
        }
    }
})(THREEx.Preloader.prototype);