Refactored RemoteDataObjectStore

Moved dependency on BrightstarDB to an implementation of
IUpdatableStore.
Initial implementation and test of retrieval
Added failing test of object update
Initial implementation of update
Added failing test
Added implementation of IDataObjectContext for DotNetRDF connections
Added failing test
Added support for dotNetRDF configuration in EntityFramework
Added failing test

Fails to insert new entity into default graph when updateGraphUri is not
set.
Fixed insert into default graph
Documentation updates
Added test of configuring a Fuseki store connection
Added example of a connection to Fuseki
Minor fix to exception handling.
Merge branch 'feature/sparql_dataobjects' into develop