Merge pull request twostraws#7 from pd95/master

Avoid crash when updating previewLayer.frame

Simplified the UI.

Merge pull request twostraws#5 from DominatorVbN/master

Added Image Picking Functionality

Merge pull request twostraws#2 from mattmaddux/master

Alternate orientation and rotation support

Stop found(code:) being called multiple times for a single scan

Merge pull request twostraws#1 from oreninit/master

Making inherited functions and variables public

Adding code.