Update the main campus alert view controller (#9)

Overhaul of the view controller to simplify it and switch over to ARC.

Signed-off-by: Blake Skinner <bskinner@mit.edu>
Emergency module updates (#9)

Remove the EmergencyUnreadCountKey constant; it's not used anywhere.

Signed-off-by: Blake Skinner <bskinner@mit.edu>
'Emergency' module data controller updates (#9)

Convert to ARC and perform some minor code cleanup.

Signed-off-by: Blake Skinner <bskinner@mit.edu>
Updates to the 'Emergency' module class (#9)

- Switch to ARC
- Fixes a crash when a EmergencyInfoDidChangeNotification is received (missing target selector)

Signed-off-by: Blake Skinner <bskinner@mit.edu>
Update 'Emergency' contacts view (#9)

ARC and some minor cleanup.

Signed-off-by: Blake Skinner <bskinner@mit.edu>
'Emergency' module updates. Fixes #9

Update 'Emergency' module classes to use ARC, replace bare ivars with properties, convert to literals/subscripting and general cleanup.

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