few more docs

Hi,

although I might touch these sources again tomorrow, I thought it's good to open a PR in order to receive early feedback (mostly of crude type about missing pieces/paragraphs). Yet, any feedback is welcome :)

tia, F.
Drop this reference, there is no reason people should still access this (especially not with EasyBuild v2.0 coming up where this will be broken hard). They can still find it via the search box, if they really need to.