* src/Makefile.am (rrsolve_LDFLAGS): Fix to not ovverride user
variables.
* src/rrsolve.c (handle_events): Speed up rrsolve robot movement
slightly.
(handle_events): Keep track of users in the game and their scores.
(handle_events): Implement "pity points". If another user with a
lower score than rrsolve matches its bid, then rrsolve will revoke
its bid (and immediately make it again), to give the other user
the first chance to demonstrate the solution. This behavior makes
solitaire play against rrsolve much more enjoyable.