clean up initialize method
extract board method
rename columns to explicit winning sequence
introduce [cpu|user]_object
replace cpu_name to method call on cpu_object
replace @cpu_score to method call on cpu_object
replace @user to sign method call on user_object
replace @user_name to name method call on user_object
replace @user_score to score method call on user_object
move default score to user object
move user name as a first argument
extract signs to separate private methods
move interface method to privete
introduce Board object, for simplicity we just inherit it from Hash class
convert filetype to unix format
add basic specs for user class
extract game board draw to board object
Advance use for respond_to rspec helper
add dimensions to board
extract user input from board object, in favor to single responsibility principal