Implement Query Intent

Fixed a bug that would have reared its ugly head if multiple agents where used...

Implement Query Intent

In this release the Query Intent is filled out by polling all the available states for the requested devices

Complete rewrite

The library initially was written extremely hackily just to get my internal home automation system to work with google actions. Little thought was given to the API, but people started using the library and filling me with shame. Thanks to a bunch of help and motivation from @localleon we are proud to release v2.0.0, a not perfect but infinitely better rewrite of gbridge that is actually usable, and more importantly extensible!