(py-shell-map): New variable contains the keymap used in *Python* shell buffers.
(py-shell-map): New variable contains the keymap used in *Python*
shell buffers.

(py-shell): Moved the require of comint to the top level.  Also
use-local-map py-shell-map instead of hacking on the comint-mode-map.
This eliminates breakage of other comint-mode buffers (e.g. shell).

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