gdc-4.8 branch

[Johannes Pfau]

I wanted to update the gdc-4.8 branch and I surprisingly got many merge
conflicts. I think this is because we used rebase on the master branch
now and then.

So are there any gdc-4.8 specific commits in that branch or could I
just delete the branch and recreate it from master?

The github branch compare tool seems to be confused as well:
https://github.com/D-Programming-GDC/GDC/compare/gdc-4.8

Most of those commits are in master as well (with a different commit
id though, because of rebasing).