Fit finalisation tools

Created by: nhartland

It seems to me that we have a pretty urgent need to sort out the fit finalisation tools here. Most specifically fitmanager, as per the issue Stefano posted in nnpdfcpp.

The workflow rearrangements break fitmanager as it stands. So in the current master there is no standard way of uploading fits to the server (this is pretty bad). Furthermore as we're changing the UI probably it's the time to replace postfit with postfit2.

We either need to (pretty urgently) add something like vp-upload. Or maybe just fix-up fitmanager to do the job in the meantime.