* NEWS: explain new behavior and arguments of `key-binding' and
`command-remapping'.
* keymaps.texi (Active Keymaps): Adapt description to use
`get-char-property' instead `get-text-property'. Explain how
mouse events change this. Explain the new optional argument of
`key-binding' and its mouse-dependent lookup.
(Searching Keymaps): Adapt description similarly. Explain the new
optional argument of `command-remapping'.
* Makefile.in (keymap.o): Add "keymap.h" and "window.h"
dependencies.
* keymap.c: include "window.h".
(Fcommand_remapping): New optional POSITION argument.
(Fkey_binding): New optional POSITION argument. Completely rework
handling of mouse clicks to get the same order of keymaps as
`read-key-sequence' and heed POSITION. Also temporarily switch
buffers to location of mouse click and back.
* keyboard.c (command_loop_1): Adjust call of `Fcommand_remapping'
for additional argument.
(parse_menu_item): Adjust call of `Fkey_binding' for additional
argument.
(read_key_sequence): If there are both `local-map' and `keymap'
text properties at some buffer position, heed both.
* keymap.h: Declare additional optional arguments of
`Fcommand_remapping' and `Fkey_binding'.