Expose Access to the queries being sent to dynamo

[gaffo]

It would be helpful in situations to allow raw access to the queries and commands being sent to dynamo without an interceptor layer at the dynamodbiface layer. For instance if I want to tweak a query and find it more fluent with raw access to the query by calling Table.Get().QueryInput() and then feed that back into All or One or whatever. This would alleviate situations where the library doesn't support a feature I need while I work to get those features into the library.