Add 1992/nathan/try.sh + format fixes

The try.sh script runs the commands provided by the judges in the try
section (which has been updated to just refer to './try.sh') and one I
included as well.

The README.md file has been format/typo checked.

1992/nathan/.gitignore

@@ -1,3 +1,5 @@
 nathan
 nathan.orig
 prog.orig
+barfoof.c
+foobarf.c