Modify license header
Update license header in source files
Move classes from testing to test
Remove testing source set and upgrade Gradle Wrapper to 1.10
Upgrade Gradle Wrapper binary
Remove Int* model classes and make them internal
Refactor IntCastling to Castling
Refactor IntChessman to PieceType
Refactor IntColor to Color
Refactor IntFile to File
Refactor IntRank to Rank
Refactor IntPiece to Piece
Make internal classes package local
Remove IMoveGenerator