changes to two correspondence files

The footnotes for two pieces of correspondence, nar.03604 and
nar.03605 were showing up inline rather than at the end of the
document. I have fixed the encoding, which was causing this problem.
The letters are available at:

http://www.whitmanarchive.org/biography/correspondence/reconstruction/tei/nar.03604.html
http://www.whitmanarchive.org/biography/correspondence/reconstruction/tei/nar.03605.html

~Liz