Merge pull request #1 from OliverLetterer/master

Child view controllers and main thread.
Set up cancel nag item in viewWillAppear, not viewDidLoad
Avoid possibly dereferencing a nil self pointer in generated error block
Call error block on the main queue
Improve cancel nav bar item management
[critical] Remove preview layer from super layer on viewWillDisappear

This fixes poor performance mentioned in #1 and avoids excessive CPU and memory usage.
Add podspec for 1.0.5
Generalize to allow any type of barcode
Add documentation for new behaviors
Merge pull request #2 from segiddins/any-barcode-type

Generalize to allow any type of barcode
Wrap format string in `stringWithFormat` call
Merge pull request #3 from segiddins/patch-1

Wrap format string in `stringWithFormat` call
add Podspec for 1.0.6
Fixing implicit enum conversion error from Xcode 5.1
Merge pull request #4 from OliverLetterer/implicit-enum-conversion

Fixing implicit enum conversion warning from Xcode 5.1
Add v1.0.7 of podspec

refs #5
Now stops AV session when cancel is tapped

Fixes issue where UI of app freezes after dismissal
Merge pull request #9 from rsmoz/master

Now stops AV session when cancel is tapped
Release 1.0.7.1.