Merge pull request #5 from avsm/master

Add release scripts to upload to GitHub releases
make sure release fetches the distfiles
Merge branch 'master' of github.com:mirage/mirage-xen-minios
Upgrade to libmini-os 0.4
Merge pull request #6 from talex5/master

Upgrade to libmini-os 0.4
update to minios-v0.4.1