Availability of custom query option in connector

[tasso85]

Following the answer received in issue #32 I understand it'll no longer be possible to download the standalone connector, as it will be included in core PowerBI.

However, the included connector lacks a functionality which is available, for example, for the MySQL connector, and which was available in your 1.0.7-beta version; that is, the ability to load data using a custom query.

Will that functionality be available in the future? Or is it not planned to include it?