Add .to_dict to Row objects

Is your feature request related to a problem? Please describe.

I've just finished testing the newly released row-string indexing feature. It's great and extremely handy for cases where a mapping interface is needed. However, I think it can go a bit further: Sometimes we need to pass a true dict into some legacy thing, and here mssql-python could help, by providing a built-in to_dict() function.

Describe the solution you'd like

I would like a function on the Row object that will return a Python dict with all of the row's values.

Describe alternatives you've considered

Interrogating the cursor's description property and producing my own dict is easy enough. But it would certainly be a lot easier, and probably faster, to let mssql-python do the work instead.

Thank you!