Committing Everything AND the Kitchen Sink.

* Merged Main Menu functionality.
* Added PauseButton and Navigation functionality.
* Main Menu still does not have options and high scores ready - these
are grayed out until I have better models to work with.
* You can quit the game in the game! Gameception!
* Missiles should explode properly now.
* Removed bug where MyDestroy on rockets was being called twice in two
different functions.
* Added PauseButton script to the "Bad Code Section."

What was not added yet I would love it to be added -
* Louder ambience please?
* Main Menu seems to screw with the ambience. Could I get someone to
take a look at that?