grip check in basher for rogues

improved the grip check for rogue bashing. also included a check for
those who don't have grip skills or does not have gripping toggled.
mage pvp update

changed 'demon' to thrall in the demon command functions. Added frozen
tomb as an attack type in the table.lua. Adjusted the way do_stand
behaves in timewarp so that it doesn't send stand twice.

Conflicts:
	scripts/attacks/aliases.lua