Nth PR on develop branch for easybuild-docs, for N=6


Hi @boegel, @stdweird,

I think the new structure is better visible at this point; can you validate?
Best way to visualise it is this one: http://easybuild-docs.readthedocs.org/en/develop/
However, giving the feedback in github style over here would help it advance faster, I guess...
... install ```gzip``` using the `goolf` toolchain (and EasyBuild v1.15.2):

(the part in parentheses doesn't make sense anymore):