got Game Center working

the score function is really weird, I had to link all of the accounts
together to get them to show up. I had to make them friends, Everywhere
I looked over Stack Overflow said the same thing.. Oh well… to do tweak
views for final turn in, add in life cycle methods to pull the data and
to let the user log in to game center through the settings, report full
score to twitter, change score screen to include all the scores….
waves, survived etc. update button for the main ui, add a main menu
button & share button to the game over screen