- converted from Python2 code to Python3 code

- in camlib.py, CNCJob class -> generate_from_excellon_by_tool() was
failing in the line to sort the tools due of been unable to compare
between dict's. I replaced that section.

svgparse.py

@@ -521,6 +521,6 @@ if __name__ == "__main__":
     tree = ET.parse('tests/svg/drawing.svg')
     root = tree.getroot()
     ns = re.search(r'\{(.*)\}', root.tag).group(1)
-    print ns
+    print(ns)
     for geo in getsvggeo(root):
-        print geo
+        print(geo)