Adaptive sequence based registration strategy

[melandur]

This is in between a hard candy and wish full thinking, since there is a wast amount and variety of sequence types.
It very likely that this request touches other parts of the pipeline as well, presumably some data control/check module (not implemented yet)
Since this is rather a broad topic I try to focus on the registration module for now.
It would beneficial to have a registration protocol, which acknowledges the sequences types.
Especially, this would be helpful to deal with diffusion and perfusion images, where more nuanced registration strategies need to be employed.