Added the Java Universal Tween Engine to the project.
This will allows us to animate almost any object.
I have used it for the Splash Screen Animation, which fades in and out
for 2 seconds.
I created Splash.java, which contains the methods for the splash screen.
Also, I have added SpriteAccessor.java which sets and gets the alpha
values for the splash screen animation.
The splash screen is called from SpokaneValleyApp.java.
Also, I have added a temporary cartoon map image to use in testing the
splash screen. This will be removed once the actual splash screen image
is created.