not more then 2 cells can be clicked
next cells
game refactor
Merge branch 'master' into game_board

Conflicts:
	app/assets/javascripts/game_boards.js
	app/views/game_boards/index.html.erb
Add .idea to ignores
check if 2nd clicked cell is in a range of 1st clicked cell via coordinates #2
Merge pull request #8 from ButenkoT/game_board

Game board work in progress