Try to implement direct pointers to other modules

[gehelem]

It could be very usefull to avoid signal/slots mechanism complexity when a master/slaver relation is needed.
for example, sequencer module could directly call "go focus" method of a focus module, instead of sending a signal and waiting focus's response.

I don't know if i'm able to do that, let's give it a try.

Of course pointer assignation should devoted at controller level, this will be hard.