PATH: post processor tweaks and loop select.

rename generic_post.py: This is actually a post specific to a machine.  The generic name is confusing
fix test case. Contour has no plunge angle
scrubbing postprocessors for python 2 style prints
Keep loop select usable when task panel is open.

src/Mod/Path/PathScripts/opensbp_post.py

@@ -141,7 +141,7 @@ def export(objectslist, filename, argstring):
 
     # Write the output
     gfile = pythonopen(filename, "wb")
-    gfile.write(gcode)
+    gfile.write(final)
     gfile.close()
 
 
@@ -325,5 +325,3 @@ def linenumber():
 
 
 print(__name__ + " gcode postprocessor loaded.")
-
-# eof