Ilektra Christidi

I think this can be reviewed now. I'll produce some profiles, to see if we gained anything, when I'm back from the holidays, I don't think I'll have time tomorrow.

There's no performance improvement seen, if anything there's a small degradation (see below). I think I understand why: the problem is the order communications are received, and not the time...

I'm also in favour of separating the system-specific from non-system specific information. If one wants to run CONQUEST on multiple systems, having it all in one file gets confusing. I'm...

Actually, can this PR please wait until we merge #290 @tkoskela ? The conflicts will be a much bigger pain if we do it the other way round....