Expand "Optimizersv4" Documentation

[tbirdso]

Possible classes to highlight:

• GradientDescentOptimizerv4
• LBFGSBOptimizerv4
• RegistrationParameterScalesFromPhysicalShift
• RegistrationParameterScalesFromIndexShift

Could be demonstrated independently as with Amoeba Optimizer or in the context of registration as in PlotExhaustiveOptimizer.