Added license, renamed module to make it actually work

transformations.scad

-module scale(v, reference=[0, 0, 0]) {
+// License: GNU LGPL 2.1 or later.
+// © 2010 by Elmo Mäntynen
+
+module local_scale(v, reference=[0, 0, 0]) {
     translate(-reference) scale(v) translate(reference) child(0);
 }