WIP: Dalmatinerdb integration

Hi,
I'm in the process of adding DalmatinerDB as a possible backend. Wanted to put in a WIP pull request and check if there is a interest in merging it once it's solid what the requirements are.

It is loosely based on the infuxDB code since both databases share a SQL like syntax so it seemed like a sensible thing to do, but probably leaves some unused code in there I need to clean up.

Cheers,
Heinz