m_size increment bug
Add a new row every s_dropsPerLevel
Tidyup
MarkDiscs -> MarkBoard
IntegerRun::FromArray: put output parameter first
Drop7::Board::ROWS -> Drop7::NUM_ROWS (ditto COLS)
Drop7::Board::DiscColumn -> Drop7::DiscArray
typedef SizedArray<IntegerRun, NUM_COLS> RowRunArray
Drop7::Board::MarkBoard() -> Drop7::Mark()
Hide MarkColumns and MarkRows
Drop7::Mark -> Drop7::SetMarksFromDiscs