Changed initializeTrasureHunt() so that it doesn't disable all buttons
on load  of game.  Changed handleLevelSelectionAndZoomIn()  so that it
displays level instructions, and removed call to sailThenZoomIn()
removed disableAllButtons call from initializedTrasureHunt function
changed starting label for mExitNewGameButton to New Game to attempt to allow player to play after they read instructions on startup