Update to Swift 3 & Notifications via enumerated types rather than strings

[camdeardorff]

• Updated the whole project to Swift 3
• The convertOrientation function now returns the calculated value from the switch statement
• The System of subscribing to a notification by knowing the 'Magic String' didn't seem too friendly or optimal, so....
  • Added an extension to NSNotification to accept a Visage Notification type and return the Notification.
  • On the user side one would use the syntax: / NSNotification.Visage(type: .blinking) /

[nitinalabur]

+1