feature changes between 0.82 and 0.91

Hi, FreeTDS developers.
Thank you for producing this library.
I'm still somewhat new to the project, but I have not found the information
I'm looking for.  I'll be glad to take directions and pointers that you may offer.

Is there a brief description of the new capabilities for 0.91?
I'm looking particularly for leverage to convince existing 0.82 users to upgrade.

Do the new capabilities require configuration change?  I know of one 'yes' case.

Also, are there any constructs or uses which should be considered 'old' or deprecated,
which your team plans to obsolete in upcoming releases?  Something akin to a migration 
guide, if that makes sense.


Thank you,
-Mike Slifcak