Adding some new wav files
Updates to Android Studio config due to version update (I think)
Updates to gradle config and app.iml due to updates to Android API version upgrade
Added basic framework of ViewPager ala developer tutorial http://developer.android.com/training/animation/screen-slide.html
Added logic to change the text and background color of each page (based on page number).
Added ZoomOutPageTransformer to give nice zoom in/out effect when swiping between pages.