Add missing states with nationally standardized surveys for FIA

MS (started in 2006), NM (started in 1999), and WY (started in 2000)
were missing from the script.

Fixes #176.

Thanks-to: Steve Vissault <s.vissault@yahoo.fr>
Whitespace cleanup in FIA script
Merge pull request #177 from ethanwhite/fix-fia

 Add missing states with nationally standardized surveys for FIA