Files added.
Added isExpired property, multiple setter method to preserve consistency.
Refactored token expiration/refreshing.
Basic implementation completed.
Minor refactor for style and parent class modifications.
Major class refactor.
Files removed.
Modified access token refresh setter to take issue date.
Hack for temp fix of auto refresh of access token.
Don't know what I'm committing here, but Xcode says something uncommitted and I can't pull until I commit so...
Merge remote-tracking branch 'origin/master'