Added Weight/BMI and Fat log access to Body Time Series Gateway
Added Activity Stats Gateway and read functions
Added Tracker Gateway and read functions
Added Goal Gateway and read functions
Added get friend invites, fixed PHPDoc for rejectInvite and added getBadges
Improved PHPDoc blocks throughout the FitBit service
Modified ApiGatewayFactory to use magic methods when getting a gateway
Added todo items to PHPDoc blocks
Added URL validation to the setCallbackURL function
Added URL validation to the initiateLogin response from FitBit
Removed the dateString parameter from all BodyGateway functions
Removed the dateString parameter from all FoodGateway functions
Removed the dateString parameter from all SleepGateway functions
Removed the dateString parameter from all WaterGateway functions
Updated EndpointGateway to throw exceptions on errors
Added Exception detection and re-throwing to BodyGateway
Converted RateLimiting interface to use DateTime type for reset times
Added Exception detection and re-throwing to FoodGateway
Added Exception detection and re-throwing to GoalGateway
Added Exception detection and re-throwing to SleepGateway