Added debian compatible stuff to the avahiclient.init script.

Signed-off-by: The Doctor <drwho@virtadpt.net>
Reset permissions on all scripts and utils to be executable.  Oops.

Renamed avahiclient.init to avahiclient because I don't feel like writing
a Makefile to install it properly.  That's one more thing to debug.

Altered debian/install script to take into account new initscript.

Signed-off-by: The Doctor <drwho@virtadpt.net>