factshow's and factfind's channel argument is now optional.
The commands will now automatically determine the channel a factoid lives in
if it is the only factoid of that name.
If there are multiple factoids existing in different channels then the commands
will display a disambiguation message and require an explicit channel argument
to choose a specific channel's factoid.
If a `workdir` factoid key is present, the launcher will chdir
to make the specified value the current working directory.
Redirect stderr output to a $modulename-stderr in the module's
current working directory.
Allows changing of bot configuration values without needing to restart
bot instance or needing to edit pbot.pl script.
Registry will initially be populated with default values from pbot.pl,
but if a registry file exists then the registry values will take
precedence over the pbot.pl values. For instance, if you regset the
bot trigger to '%' then the trigger will be '%' even if pbot.pl has '!'
or something else explicitly set.
Some registry items can have trigger hooks associated with them. For
instance, the irc->botnick registry entry has a change_botnick_trigger
associated with it which changes the IRC nick on the server when a new
value is set via regset/regadd.
Tons of other fixes and improvements throughout.
