Cuts size of export files in test suite by a factor of four. Not a
big deal for disk usage, as export files compress very well, and disk
space is cheap anyway. Export files are simply easier to work with
when they aren't full of redundant crap.
Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
empdump exports and imports game state as plain text. Limitations: it
currently can't export player bmaps, power report, telegrams,
announcements, message of the day, no-login message and log files.
Exported floating-point values may be inexact. Importing an exported
game state may not result in identical data files; besides the loss of
floating-point precision just mentioned, coordinates are normalized,
and characters beyond a string's terminating zero in a character array
are lost. Bug: importing resets timestamps to zero. It should set
them to the current time.
