pkg: fix gerbolyze script

this broke for no apparent reason. python packaging is terrible. so much
enterprise-grade code for what really should be a very simple job.

MANIFEST.in

@@ -6,3 +6,4 @@ include MANIFEST.in
 include setup.py
 
 recursive-include gerbolyze *.py
+recursive-include bin *

bin/gerbolyze

@@ -0,0 +1,5 @@
+#!/usr/bin/env python3
+
+if __name__ == '__main__':
+    import gerbolyze
+    gerbolyze.cli()

setup.py

@@ -29,10 +29,7 @@ setup(
     name = 'gerbolyze',
     version = get_version(),
     packages=['gerbolyze'],
-    entry_points = '''
-        [console_scripts]
-        gerbolyze=gerbolyze:cli
-        ''',
+    scripts=['bin/gerbolyze'],
     description = ('A high-resolution image-to-PCB converter. Gerbolyze plots SVG, PNG and JPG onto existing gerber '
         'files. It handles almost the full SVG spec and deals with text, path outlines, patterns, arbitrary paths with '
         'self-intersections and holes, etc. fully automatically. It can vectorize raster images both by contour '