fixed license and typo for teardrop.scad

Author: timschmidt

teardrop.scad

@@ -1,8 +1,22 @@
-// From http://www.thingiverse.com/thing:3457
-// © 2010 whosawhatsis 
+/* From http://www.thingiverse.com/thing:3457
+   © 2010 whosawhatsis 
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
 
 /*
-This script generates a teardrop shape at the appropriate angle to prevent overhangs greater than 45 degrees. The angle is in degrees, and is a rotation around the Y axis. You can then rotate around Z to point it in any direction. Rotation around Y or Z will cause the angle to be wrong.
+This script generates a teardrop shape at the appropriate angle to prevent overhangs greater than 45 degrees. The angle is in degrees, and is a rotation around the Y axis. You can then rotate around Z to point it in any direction. Rotation around X or Y will cause the angle to be wrong.
 */
 
 module teardrop(radius, length, angle) {