added uuidV1 entity

elxr.js

       function __defineKernel(){
 
         // MAC and time. Guaranteed unique unless generated way too fast or parallelly.
-        //const uuidv1 = require('uuid/v1'); // (date-time and MAC address)
+        //const uuidV1 = utils.core.uuidV1; // (date-time and MAC address)
         //const uuidv2 = // (date-time and MAC Address, DCE security version)
         
         // (namespace name-based) ...