* callint.c (Vshift_select_mode): New var.

* callint.c (Vshift_select_mode): New var.
(Finteractive): Document new ^ spec.
(Fcall_interactively): Call handle-shift-selection if the ^ spec
is present.

* keyboard.c (Vthis_command_keys_shift_translated): New var.
(command_loop_1): Avoid running the direct display versions of
forward-char and backward-char if shift-selection may occur.
Don't change the value of transient-mark-mode; this is now handled
by handle-shift-selection.
(read_key_sequence): Set Vthis_command_keys_shift_translated if
shift-translation takes place.

* buffer.c (Vtransient_mark_mode): Move docstring to simple.el to
avoid clobbering by define-minor-mode.

* cmds.c (Fforward_char, Fbackward_char, Fforward_line)
(Fbeginning_of_line, Fend_of_line): Add ^ interactive spec.

* syntax.c (Fforward_word): Add ^ interactive spec.

* window.c (Fscroll_up, Fscroll_down, Fscroll_left)
(Fscroll_right): Add ^ interactive spec.