Second commit

Added:

-scoring system
-high score system (passed into second view controller
-label telling the player whether it's the computer's turn or his turn
-algorithm to sort high scores
-UIAlertView with textField when a player gets a high score
-an initial dummy high score list

Still needs:

-verify that high score sorting algorithm (method sortHighScoreList)
works as intended
- sound effects (insert code into ColorPanelView class file)
- working tableView in HighScoreViewController (only draws a blank
tableview for right now)
DONE - ensure user input is ignored while computer is still playing
sequence
(use BOOL playerTurn to perform check)
- elimination of UIAlertView telling user Correct Answer (change to a
simple delay before continuing with game)
- minor tweaks