Clean up a bit.
Add signature files for truecrypt-1.0a.zip and truecrypt-1.0a-source-code.zip (don't have this one). Found at http://alt.security.scramdisk.narkive.com/gIBlMHw3/i-found-a-truecrypt-1-0-mirror and the key for truecrypt-1.0a.zip matches.