'Scanner' module updates (#16)

Enable ARC and switch to autosythesized properties.

Signed-off-by: Blake Skinner <bskinner@mit.edu>
'Scanner' modernization updates (#16)

ARC updates to the scanner overlay.

Signed-off-by: Blake Skinner <bskinner@mit.edu>
Don't try to handle orientation-related things here; the view controller should take care of it.

Signed-off-by: Blake Skinner <bskinner@mit.edu>
'Scanner' modernization - CoreData (#16)

Enable ARC for the model (and model controller) classes.

Signed-off-by: Blake Skinner <bskinner@mit.edu>
'Scanner' modernization - Scan Detail (#16)

- ARC compatibility
- Switch to literals and subscripting

Signed-off-by: Blake Skinner <bskinner@mit.edu>
'Scanner' modernization (#16)

Enable ARC for the module controller and the 'Scanner' root view controller.

Signed-off-by: Blake Skinner <bskinner@mit.edu>
Merge 'issues/16-scanner' into 'arc-unstable'. Fixes #16

Signed-off-by: Blake Skinner <bskinner@mit.edu>