makepkg.py: move _sign() at top
makepkg.py: sort functions according to the main() call order
makepkg.py: __call() -> _call()
makepkg.py: put all the code in a single function for clarity
makepkg.py: make raw a string that contains a single backslash
MacOS/makepkg.py: also ship the mod_dash
versiondir-skel/start.sh: we changed the update/unix.py flags

From -D (daemonize) to -ad (auto-updates and daemonize).
MacOS/makepkg.py: fix perms because of my restrictive umask