Merge pull request #99 from ChrisGrant/performance

Improving performance by using CATransation Commit when applying themes.
Merge pull request #100 from ChrisGrant/performance

Performance
Merge pull request #101 from ChrisGrant/performance

Fixed IB warning.
Merge pull request #102 from ChrisGrant/performance

Updated the icons so the app will run on iOS6 and won't show warnings an...
Fixed the position of the shadow for the back button item.
Fixed the back button transition and rendering with shadows.
Merge pull request #104 from ChrisGrant/shadows

Back Button Shadows
Fixed #103.

This wasn't really a bug - just a small problem with the interface builder file. The background colour on the image view had been set to light grey, so it was expected behaviour really!

I've cleared the background colour now so the demo looks correct.
Merge pull request #105 from ChrisGrant/master

Fixed #103.