restructer and move to esdoc

src/Util/ID.js

@@ -1,20 +0,0 @@
-
-export default class ID {
-  constructor (user, clock) {
-    this.user = user
-    this.clock = clock
-  }
-  clone () {
-    return new ID(this.user, this.clock)
-  }
-  equals (id) {
-    return id !== null && id.user === this.user && id.clock === this.clock
-  }
-  lessThan (id) {
-    if (id.constructor === ID) {
-      return this.user < id.user || (this.user === id.user && this.clock < id.clock)
-    } else {
-      return false
-    }
-  }
-}