Firewire: fix double free about camera from pydc1394 (always keep a reference and do a memory leak.) This will be fix later.
Firewire: return boolean on some function, improve message error. Media: Do initiliaze when reload is called.
Firewire: Improve reopen camera with a thread with time.sleep(1). Manage the init to be ready at the good time when camera is ready to stream.