code: function extend(parent, ext) {
      var proto = parent.prototype || parent;
      merge(proto, ext);
      return parent;
  }
docs: Extends the prototype of an object if it exists otherwise it extends the object.
  
  @example
  
  var MyObj = function(){};
  MyObj.prototype.test = true;
  comb.extend(MyObj, {test2 : false, test3 : "hello", test4 : "world"});
  
  var myObj = new MyObj();
  
  myObj.test => true
  myObj.test2 => false
  myObj.test3 => "hello"
  myObj.test4 => "world"
  
  var myObj2 = {};
  myObj2.test = true;
  comb.extend(myObj2, {test2 : false, test3 : "hello", test4 : "world"});
  
  myObj2.test => true
  myObj2.test2 => false
  myObj2.test3 => "hello"
  myObj2.test4 => "world"
  
  
  @param {Object} parent the parent object to extend
  @param {Object} extend the extension object to mixin to the parent
  
  @returns {Object} returns the extended object
  @memberOf comb
  @static