make paths2openscad more command-line friendly

paths2openscad.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # openscad.py
 
@@ -240,7 +240,7 @@ class OpenSCAD( inkex.Effect ):
             help="The active tab when Apply was pressed" )
 
         self.OptionParser.add_option('--smoothness', dest='smoothness',
-            type='float', default=float( 0.2 ), action='store',
+            type='float', default=float( 0.02 ), action='store',
             help='Curve smoothing (less for more)' )
 
         self.OptionParser.add_option('--fname', dest='fname',

sc4.scad

@@ -1,5 +1,5 @@
 use <keygen.scad>
-include <sc4_polygons.scad>
+include <sc4.gen.scad>
 
 key_blank(outline_points,
           warding_points,
@@ -8,4 +8,4 @@ key_blank(outline_points,
           emboss_right_paths=emboss_paths,
           emboss_left_points=emboss_points,
           emboss_left_paths=emboss_paths,
-          offset=-outline_points[187]);
+          offset=-outline_points[187]);