Finished work on Equal methods.

Introducing new mitkTesting.h with verbose version of the mitkVector equal methods. New Macros MITK_TEST_EQUAL and MITK_TEST_NOT_EQUAL with default parameters.
For scalar types, there are now two different Equal signatures:
mitk::Equal(scalar1, scalar2, eps=mitk::eps) with 2 or 3 parameters
mitk::Equal(scalar1, scalar2, eps, verbose) with exactly 4 paramters to get rid of ambiguous function calls.