YARP_FEATURE_XXX

[triccyx]

Speaking of yarp::dev::IFrameGrabberControls and in particular to set/get/hasFeature
I think it could be a good idea to give more freedom to this method. For new cameras, we will need more FEATUREs
that are not present. So:

1. Give me the possibility to specify my own feature with the current methods.
2. Add to the interface, a new set of methods that could be set/get/hasControl and they do not do any operation on the controlid.

[drdanz]

I think it would be a good idea if we could also merge the IFrameGrabberControls interface with the IFrameGrabberControlsDC1394

[triccyx]

Ok agree, but this is out of scope for this discussion