Adding comparison for ImageRegistrationMethod1 example

Change-Id: Ia74b2f26736dc3983601f27c2739a524e4f78cd4
Improve CXX ImageRegistration2

The normal gradient descent wasn't converging and was very sensitive
to the learning rate. This was changed to the gradient descent with
line search optimizer to rapidly get to a results.

The results are compared with the grown truth now.

Change-Id: I9ee9034e6a95b281584ba20393440b2cb566a7fc
Merge topic 'SIMPLEITK-536_CreateTransformTestingInfrastructure' into next

3acd732b Improve CXX ImageRegistration2
bdef299a Adding comparison for ImageRegistrationMethod1 example