Fix for iOS status bar not being visible due to black background

Adds a meta tag to have the top status bar in iOS render with white text rather than black text when running as a web clip.

Before on left, after on right.

![gb_diff](https://cloud.githubusercontent.com/assets/176014/3787198/977ad0ac-1a07-11e4-998f-a2d16aed727c.png)