add ms sql server support

[vastbinderj]

let's migrate the work we did to support sql server - only if its less than 2 days work.

I know we did work to improve tests related to sql driver support. I'd like to see this added to trunk code base. @vnaz

[vastbinderj]

going to keep working on this as I have time, its taking me longer than I expected to get this updated. I'll push my local changes up to the feature branch