Changed from daemon mode to one instance for each metalink (waiting for
the first one to finish)
More work done in download.py
Removed prints. Download.py is not ready yet
More tests need to be done on download.py, it's far from being ready.
Reverted download to daemon verison. I can't make up my mind.
Downloading with aria2 has a lot of problems (imho is threading what it makes it all go wrong)
Sometimes progress doesn't reach 100% (even though the download reaches 100%)
Created a modified version of 10_linux so our menu entries are written correctly by grub-mkconfig (including fallback-initramfs)