Fix the style to be more compliant with Python 2.7's general style for executables.

This also enables the user to import autorotate.py as a library, although why
anyone would want to do that is beyond me.

autorotate/autorotate.py

@@ -73,6 +73,10 @@ def is_in(pen):
     return (res and res.group(1).lower() == 'in')
 
 
+def manage_orientation_and_palm_rejection(options):
+    current_orientation = ''
+    currently_proximate = False
+
     while True:
         int_displays = countdisplays()
         time.sleep(1.0/freq)
@@ -108,3 +112,6 @@ while True:
                 print "%s palm rejection" % ("Activating" if pen_status else "Deactivating")
                 currently_proximate = pen_status
                 os.system("xinput %s '%s'" % (xinput_statemap[pen_status], devicename))
+
+if __name__ == '__main__':
+    manage_orientation_and_palm_rejection(sys.argv[1:])