Imported from archive.

Imported from archive.

* LICENSE, mudpy, mudpy.py: Altered the copyright statements to
correctly mention all years instead of only the most recent.

* command (command:chat, command:say), mydpy.py (User.send)
(command_chat, first_word, handler_active): Added a chat command
which toggles the avatar in and out of a mode where all further
lines of input are passed as parameters to the say command.

* command (command:quit): Minor clarifications to several command
help texts.

* command (command:say), mudpy.conf (internal:language), mudpy.py
(command_say): Moved the capitalize_words list facet to a more
flexible typos dict, and condensed punctuation_* facets into an
actions dict facet.

* mudpy.py (User.deactivate_avatar): Fixed a bug where avatars
without a location could trigger an exception.
(command_help): Added a see_also list facet for menu elements, which
allow help output to suggest other related commands.
(create_pidfile, remove_pidfile): Minor adjustments to assure file
path canonicalization.
(get_loglines): Aesthetic tweaks to the show log output.
(on_pulse): Create internal:counters if it doesn't exist, to avoid
throwing an exception.