Forces iOS Safari to update the screensize on orientation-change (landscape/portrait)

This blog post details the problem that's fixed.

My client that I'm using this theme for has a device lib. We've tested & verified this fix on the following devices (and don't see any negatives on desktop breakpoints):
* iPhone 4S iOS 6.0
* iPad Mini iOS 6.1.3
* iPad 3 iOS 6.1.3
* iPad 2 iOS 5.1
* HTC Thunderbolt Android 2.3.4
* Samsung Galaxy S3 Android 4.1.1
* Samsung Galaxy S android 2.3.5