Initial commit
Creates empty 9x9 board
creates Tile class with neighbors method
Creates board with Tile objects.
add bombs to grid working
adds neighbor_bomb_count to Tile
Adds game.rb, renders game.
Adds reveal method to Tile
Allows game to be won or lost
adds flagging and end-game rendering
displays row and column numbers
refactors code, runs as a ruby script
Saves and Loads games, Quits games
Sets difficulties
Updates README
Adds color
Adds more color
adds newline for pre-game message
Updates to repo