Refactored Data Manager

Separated routing from business logic and made things DRY.
More refactoring
Fixed bindInstance

Now using router.param()
Fixed DriverSparqlStream
Use DriverSparqlStream queue for clear & delete
Fixed reference to dataManager.metaGraphIri
Updated data-manager routing

Proper message for clearing, etc.
Fixed handling of meta drivers

Fixed clearing meta driver triples
Fixed reference to toNT in shared