Added support for Refresh and ForceUpdate.

1. Data classes now can pull latest state from the backend via the
RefreshAsync() method.

2. Data classes can also force a server update irrespective of local
changes.
Fixed api inconsistencys in email and search apis.

1. Changed fluent interface for Email from NewEmail to Email class.
2. Renamed page parameter to pageNumber for all apis.
Renamed App to AppContext for consistency with rest of SDK.
Bug fixes for SDK

1. Removed Date and Time support as this is removed from the api.
2. Fixed upload connection termination for NET4.5 SDK.
3. Added missing implementation for BetweenQuery.
Updated binaries and nuget for v0.9.9 release.