code: function ( safe ) {
  		var s = function () { return ( ( ( 1 + Math.random() ) * 0x10000 ) | 0 ).toString( 16 ).substring( 1 ); },
  		    r = [8, 9, "a", "b"],
  		    o;
  
  		o = ( s() + s() + "-" + s() + "-4" + s().substr( 0, 3 ) + "-" + r[Math.floor( Math.random() * 4 )] + s().substr( 0, 3 ) + "-" + s() + s() + s() );
  
  		if ( safe === true ) {
  			o = o.replace( /-/g, "" );
  		}
  
  		return o;
  	}
docs: Generates a version 4 UUID
  
  @method uuid
  @param  {Boolean} safe [Optional] Strips - from UUID
  @return {String}       UUID