pkgs: Add new aacolorize script to colorize ASCII.

Basically this is just an old script I wrote to separate and merge color
information from the actual ASCII arts.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
packages: Add aacolorize helper to systemPackages.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
modules: Add "fancy" vlock-based lock screen.

Unfortunately it's only "fancy" in quotes because the way it's activated
is using a dummy socket file with the user "aszlig" hardcoded at the
moment. In terms of security it isn't a problem, because vlock is using
PAM for authentication and it falls back to authenticating against the
root user.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Integrate console lock screen into i3.

Now it's enough to just press super + shift + escape in order to trigger
the socket and thus the lock screen.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>