Checkpoint
Merge branch 'dnoble/refactor' of https://github.com/splunk/splunk-sdk-csharp-pcl into dnoble/refactor
Resolved:
* DVPL-4909: MockContext | CanCrudSavedSearch fails in Playback mode due to DateTime serialization issue.
  Fixed DateTime issue and changed signature of ISavedSearch.GetScheduledTimesAsync. (DateTime does not work well as a surrogate for a Splunk time string).
Corrected:
* SingleValueParameter.ToString declaration. It is now an override.