Update SleepLog.cs
Update SleepLog.cs

Added new properties exposed by FitBit API: AwakeCount, AwakeDuration, RestlessCount and RestlessDuration.
amammay/Fitbit.NET,AlexGhiondea/Fitbit.NET,aarondcoleman/Fitbit.NET,WestDiscGolf/Fitbit.NET,AlexGhiondea/Fitbit.NET,amammay/Fitbit.NET,aarondcoleman/Fitbit.NET,amammay/Fitbit.NET,AlexGhiondea/Fitbit.NET,aarondcoleman/Fitbit.NET,WestDiscGolf/Fitbit.NET,WestDiscGolf/Fitbit.NET