Use the iOS 7 hierarchy rendering methods instead of renderInContext:.
Use the iOS 7 hierarchy rendering methods instead of renderInContext:.

This is a work in progress and needs to be conditional to support iOS  5/6 and also 7 at the same time. I don't have time to do this tonight but I will put together a release tomorrow with it.

benzhipeng/SDScreenshotCapture,hamilyjing/SDScreenshotCapture,shinydevelopment/SDScreenshotCapture