Backend fixes

Backend Updates

Functionality Updates and Backend Updates

Functionality update

Updates made to workouts - added rest timer, set classification, supersetting and more customizable features.
Updates have been made to the server and server connections between the app and servers for social/seasons purposes.
Updated user interface for seasons and social.

Functionality Updated

Functionality and system upgrades to servers.

Apple Healthkit connection restored for steps and workouts.
Leaderboard now populates players from backend.
Health now regenerates while application is closed.