[gnugo-devel] pre-rotate implemented

[Trevor Morris]

http://www.public32.com/games/go/trevor_3_11.2

 - pre-rotated pattern generation in mkpat. (-p option) implemented.
 - %2m added as valid syntax for gprintf
 - relabel rotation matrices in transform.c

In transform.c, "invert" didn't make sense to me, so I attempted to
clarify the meaning of the matrices.

The docs for DFA path are incorrect.  The current actual path covered
looks like (from A-M):
  K
 LDJ
MEACI
 HBG
  F

This patch causes no changes, as no pattern databases use
the '-p' option yet.  I was surprised that there wasn't a
large performance increase.  I was also surprised that the
database size impact is enormous.  Don't even try this
option with the owl_attack or owl_defend datbases.

-Trevor