Simul efun: query_timezone_name - get the offset of the timezone Nemesis is
	                          running in

Synopsis:
	string query_timezone_offset()

Description:
	This is a hack to get the timezone we are running in. It would be cool
	if it was a real efun and the GD had support for it, but at the moment
	that is not the case.

Return value:
	The offset of the timezone, in the format "[+-]hhmm". Normally "+0100"
	or "+0200".

Examples:
	query_timezone_offset()	returns "+0200"

Note:
	Returns a string!

See also: lib/query_timezone_name