noop as resource meta param

first part of #21
tested with example/noop1.yaml on CentOS 6

pgraph.go

@@ -729,7 +729,7 @@ func (g *Graph) Process(v *Vertex) {
 
 		obj.SetState(resStateCheckApply)
 		// if this fails, don't UpdateTimestamp()
-		checkok, err := obj.CheckApply(true)
+		checkok, err := obj.CheckApply(!obj.GetMeta().Noop)
 		if checkok && err != nil { // should never return this way
 			log.Fatalf("%v[%v]: CheckApply(): %t, %+v", obj.Kind(), obj.GetName(), checkok, err)
 		}
@@ -745,6 +745,11 @@ func (g *Graph) Process(v *Vertex) {
 			}
 		}
 
+		// when noop is true we always want to update timestamp
+		if obj.GetMeta().Noop && err == nil {
+			ok = true
+		}
+
 		if ok {
 			// update this timestamp *before* we poke or the poked
 			// nodes might fail due to having a too old timestamp!