Add a test for correct integer komi
Change scoring to allow for ties.

Scores are now doubles and scores of zero are ties.
Some tests had to be changed because they had expected
scores hard-coded using the old method of calculation.
Move toward fractional wins.

SearchNode.recordPlayout now takes a fraction of a win to record.
There is now a test to see if fractional win updating is correct.
Modify players to handle fractional wins.

MctsPlayer no longer ignores ties. Instead
it updates the tree with half wins for both colors.
Additionally, wins are now stored as win ratio and
number of runs, from which total wins are calculated
as needed. All test pass and Orego appears
to play gnugo reasonably.
Fixes .gitignore problem that was preventing us from committing .sgf
files. Adds those files.
Fixup winnerFromScore in Board
Add a test for RaveNode.
Modify RaveNode to record partial wins.
Merge master into integer_komi
Merge branch 'master' of ssh://github.com/Orego/Orego into int_komi_merged
Remove redundant calls to SearchNode.getWins
Finish switching win rates to floats.
Add ability to set komi using command line arguments.
Use float literals instead of casting.
Merge pull request #6 from Orego/int_komi_merged

Play Correctly with Integer Komi by Understanding Ties