Provide a tool to export keys listed in the PKGBUILDs validpgpkeys to keys/$fingerprint.gpg.
The presense of the "keys" directory alongside the PKGBUILD in trunk/ is tested during commitpkg. If the directory is abscent, keys are exported and added to the commit. If the directory is present, a check is made to ensure all valid PGP keys are provided.
Implement rfcs!11 (merged)