[MM 0.7] new Modem.Drivers instead of Modem.Driver

[Aleksander Morgado <aleksander lanedo com>]

Hey,

Updated the 'Modem' DBus interface in git master so that instead of
returning just one driver (it was the driver of the first port grabbed)
it now returns a list (signature 'as') of all drivers for all the
grabbed ports.

Cheers,

-- 
Aleksander