[Bug-gnubg] Time controls added on main branch

[Stein Kulseth]

I have merged in the time control code on the main branch. All changes 
should be protected
with #if USE_TIMECONTROL, so the less adventuorous minded should not 
experience any change.

Configure with --with-timecontrol to enable.

I have also started looking into saving/loading with time info, and have 
been able to save
one (1) match and load it again without segfault or obvious errors...

Added to sgf spec:
   move properties WX and BX, which awards extra points to the w or b 
player during the game.
   it expects just an integer parameter. ex:
        WX[2]
   I always interpret it as a clock penalty, if we want it to cater to 
other situations - eg.
   points being awarded as penalty for other irregularities - then the 
property should perhaps also
   include a string describing reason for awarding the point, like 
W[1time].

--
Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/