Implement SQL Server RDBC driver

[andygrove]

Use https://docs.rs/tiberius/0.3.2/tiberius/

[ghost]

I am still getting up to speed on Rust, but I wanted to suggest that supporting trusted connections in the SQL Server implementation here will be important to usability, as and when you can find time. Several of my workplaces have leveraged that functionality heavily and I couldn't really use a crate without it.

Thanks for your effort on this, it looks very promising!