Fix for iOS6 compatability.
Merge pull request #83 from ChrisGrant/master

ImageViewStyle's border should be an optional property.
Merge pull request #85 from ChrisGrant/master

Quick typo fix!
The back button now renders with a "<". Fixes #84.
Merge pull request #82 from ChrisGrant/bugs

Fix for iOS6 compatability.
Merge pull request #86 from ChrisGrant/backButton

The back button now renders with a "<".
Updates to the JSON files. Removed unnecessary and incorrect properties.