Make Single-Player and Two-Player consistent

[gehrigweber]

Two-Player mode works fine (except for issue #82). However, Single-Player mode is lacking some features and has bugs that aren't present in Two-Player mode.
To resolve this issue:
-Make the AI move on its own
-Make the AI able to skip turns on its own
-Stones might pop in and out or spontaneously disappear; fix this
-Remove any other bugs not present in Single-Player mode

(Estimated 200 points)

[brianslee]

Single player needs a lot more love.
W18 Ok. 250 pts