Add National Science Foundation

Currently getting a few 404s:

http://www.nsf.gov/oig/search/m00090035.pdf
http://www.nsf.gov/oig/search/m01010002.pdf
http://www.nsf.gov/oig/search/m01020006.pdf
http://www.nsf.gov/oig/search/m97100037.pdf

If you change the `m` to `M`, they resolve. I'm going to reach out to them to see if they can fix the links. If they don't respond, I can add a fix to this.

I'm also going to see if I can get them to add a published date for the one report in `REPORT_PUBLISHED_MAP`.