Added OperationStatus model  and custom scheduler exceptions class. Updated the ScheduledTasks to return operationId and operation status.
Updated Nuget for synchronous calls and some cleanup
Cleanup, addded exception handling.
Updated for exception handling, removed SchedulerModelValidation exception from delete. Performed cleanup on Nuget client project.
Added code for getting task history..yet to do an end to end testing for getting history.
Updated for dev environment
Added asynchronous method for getting task history, updated tenant for dev environment.
Cleanup
Cleanup.
reference to ServiceStack.text added to nuspec