Imported from archive.

* LICENSE: Moved to doc subdirectory, indicating it's a
documentation file.

* archetype, command, menu: Moved to share subdirectory, indicating
it's generally read-only data. Also appended .mpy extention to file
names, to indicate they're mudpy data.

* banner.txt, login.txt, mudpy.conf: Moved to etc subdirectory,
indicating they're generally hand-edited configuration data.

* lib/mudpy/__init__.py: Created a new Python module package, to
begin the process of splitting up the old monolithic module.

* mudpy: Moved to bin subdirectory, indicating it's directly
executable.

* mudpy.conf (__control__, internal:storage), mudpy.py
(DataFile.load, find_file, replace_macros): New functionality allows
arbitrary location of data files from relative or absolute paths out
of a prioritized series of potential directory trees.

* mudpy.conf (internal:network): Changed host to the IPv6 localhost
address of ::1 instead of the old IPv4 127.0.0.1 equivalent.

* mudpy.py: Renamed to misc.py and added to the new lib/mudpy Python
module package.
(Universe.initialize_server_socket): If local IPv6 support is
present default to listening on ::, otherwise fall back to 0.0.0.0
like before.
(command_say): Instead of denying parameters which look like
replacement macros, they are simply escaped before being processed.
Messages enclosed in quotation marks no longer get language fix-ups
applied. Fixed a bug where a type exception could be triggered if an
actor provided parameters to the say command which evaluated to an
empty string; reported by Mark Kolloros, a.k.a. Colourful.

* sample/index: Renamed to __init__.mpy in an effort to emulate
Python module package structure for groups of mudpy data files.

* sample/location, sample/prop: Appended .mpy extention to file
names, to indicate they're mudpy data.