Implement basic classes and guidelines for minesweeper CLI project.
Add test mode to board and tile classes, and sketch out methods for UX.
Change default bomb count to allow custom bomb counts per board.  Fill in details in minesweeper ux.
Fix bug in board initialize, and remove position from tile.  Tile does not need to know own position.
Clean up comments.
Working game without reveal-nearby-tiles functionality.
Debugged minesweeper.
Minor bug fixes.
Add class exercises.