Add ability to take images for BNRItem
Fix #3. Correct broken connection, and correct simulated metrics
Save the image after picking it to the image view.
Add a ImageStore class for storing images to the disk.
Swift properties are strong by default
Finish chapter 11.
Merge branch 'chapter11-camera'

* chapter11-camera:
  Finish chapter 11.
  Swift properties are strong by default
  Add a ImageStore class for storing images to the disk.
  Save the image after picking it to the image view.
  Fix #3. Correct broken connection, and correct simulated metrics
  Add ability to take images for BNRItem