WIP: all metrics are added and tested, end of step 1

till now, all linear transforms and all metrics are implemented and
tested. Every thing works for (auto)intial transform and without them/
(auto)mask for fixed and moving images and without them/
multi steps.
Step 1 is done, and it is a time to start working on SyN and BSpline.

NOTE: using "useCenterOfHeadAlign" produce segfault. It is the last
feature that should be fixed for the step 1.