Fixed some copyright disclaimers

gears.scad

@@ -1,3 +1,7 @@
+// Copyright 2010 D1plo1d
+// LGPL 2.1
+
+
 //test_involute_curve();
 //test_gears();
 //demo_3d_gears();

motors.scad

@@ -1,3 +1,5 @@
+// Copyright 2010 D1plo1d
+
 // This library is dual licensed under the GPL 3.0 and the GNU Lesser General Public License as per http://creativecommons.org/licenses/LGPL/2.1/ .
 
 include <math.scad>

nuts_and_bolts.scad

@@ -1,3 +1,5 @@
+// Copyright 2010 D1plo1d
+
 // This library is dual licensed under the GPL 3.0 and the GNU Lesser General Public License as per http://creativecommons.org/licenses/LGPL/2.1/ .
 
 //testNutsAndBolts();