ENH: adding itk functor for bitwise not operator

Change-Id: I61fe05c51488ef05b140725f0b6b980f8ac763cc
Wrapping functor BitwiseNot to be SimpleITK filter

Change-Id: I617e7ff359a65a1a560cd60d2c18ff9086194b83
Merge topic 'SIMPLEITK-390_AddBitwiseNotFilter' into next

8fd111f Wrapping functor BitwiseNot to be SimpleITK filter
6c82e09 ENH: adding itk functor for bitwise not operator