fix minimax to ensure its unbeatable
move the runner back to computer vs human || human vs computer
add #DisplayTied to Display interface and implementations
delete dead opponent piece function from ttt rules
un-pend 2 prompter tests
more clean up
add a couple additional helpful resources for installation of go
minimax refactoring
refactor TTTBoard#IsValidMove
use PromptForWhoShouldGoFirst in runner
more clean up
remove GetPiece functions from players, as it is inherited from BasePlayer
clean up console prompter
set logic's priority piece when changing unbeatable computers player
change ttg download method to use go get
add ginkgo watch instructions to readme
small ttt board refactoring