nested typenames, C++14 and gcc 5.0+

@steinbac : why is gcc 5.0+ needed to build gearshifft? can you provide a minimal "not compiling example" with gcc4.9? I've used template template parameters alright with gcc <5.0!

@werner_extern : it is not the nested template, but the nested template-typename construct. try it out: http://pastebin.com/zQpGPAFf