King's movement - castling - WinBoard support

[lrozenblyum]

1. WinBoard engine must receive our castling correctly
2. We must interpret WinBoard castling correctly

It's an important step in castling integration #76

[lrozenblyum]

Probably accidentally we FIT into winboard format.
Winboard supports castling exactly in the same way we send it!
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Normal moves: e2e4
Pawn promotion: e7e8q
Castling: e1g1, e1c1, e8g8, e8c8
Bughouse/crazyhouse drop: P@h3
ICS Wild 0/1 castling: d1f1, d1b1, d8f8, d8b8
FischerRandom castling: O-O, O-O-O (oh, not zero)
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I think we haven't selected SAN : (and probably don't need it)
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Beginning in protocol version 2, you can use the feature command to select SAN (standard algebraic
notation) instead; for example, e4, Nf3, exd5, Bxf7+, Qxf7#, e8=Q, O-O, or P@h3. Note that the
last form, P@h3, is a extension to the PGN standard's definition of SAN, which does not support
bughouse or crazyhouse.
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