Conform to current ITK coding standards

[jhlegarreta]

Conform to current ITK coding standards. Specifically:

• [ ] Add the corresponding license notice in the header of all source files.
• [ ] Remove unnecessary comment blocks (e.g. //-----------------------------------------, etc.)
• [ ] Adopt C++11 features and current ITK coding style:
  • [ ] use the itk prefix for the ifdef macros for each file.
  • [ ] Prefer type alias over typedef
  • [ ] Use typename in class template argument types
  • [ ] Prefer C++11 math over vcl_*
  • [ ] Use of constexpr
  • [ ] Prefer error checked std::sto[id] over ato[if]
  • [ ] Use the new multi-threading classes
  • [ ] Use the ITK_DISALLOW_COPY_AND_ASSIGNmacro in the public section

etc.

[jhlegarreta]

I can do part of this.

As for the license, @SRigaud @agouaillard I'm wondering which license type you had in mind for the module.

Thanks.