Revise "about" page

[FilippoOggionni]

This is a follow-up from #21 and it concerns this page.

The page should be split in 4 different subpages (in parenthesis, you see who I think are the most suitable people to draft these pages - what I need is content, even in the form of word documents, while I can fix the style itself if needed):

• [x] history of the project (@DominicDirkx)
• [x] roadmap + ongoing activities (@DominicDirkx @geoffreygarrett)
• [x] success stories (@DominicDirkx - presenting in more detail a selection of the current list of papers + the full list as it is should suffice)
• [x] core team + past contributors (@FilippoOggionni)

[DominicDirkx]

The above looks like a good division. Any thoughts on we shall we list the "past contributors"? We can list the names (if people want), with a possible link to their Github account?

[FilippoOggionni]

I think it is a good idea. I'd include pictures and roles for the currently active team only (or at least the activity area coordinators), while for past contributors name and link to Github account should be enough