Change return type of ILiteRepository.Insert to match ILiteDatabase.Insert

[InvisiblePhil]

The documentation of ILiteRepository.Insert implied it returns the ID of the insert, but it returned void

Changed to make this API consistent

[mahop-net]

Summary should be changed accordingly.

If not accepted summary should also be changed... :-)

[InvisiblePhil]

Summary should be changed accordingly.

If not accepted summary should also be changed... :-)

The summary as-is notes the method returns the ID - so what change is needed if the PR is accepted?

[mahop-net]

OK, it really returns the ID - sorry I thought BsonValue holds the complete document, but it is only the ID...