- add build support for curses extension to be a normal DLL as well as   a Python extension, so that the curses_panel extension works. - minor compiler switch tweak.
- add build support for curses extension to be a normal DLL as well as
  a Python extension, so that the curses_panel extension works.
- minor compiler switch tweak.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator