adding iphone 6 and 6+ launch images, converting demo app to use storyboard as entry point
fixing bug where the size of a page's view controller might not have been set to the right size on the scroll view it was being inserted into, affecting iphone 6 and 6+
demo app, setting background colour of view in storyboard to be clear so the black shows through
fixing bug where the optional bar/line under the top scroller wouldn't resize with the view's width when the device was rotated into landscape