Travis: fix again
Upgrade to libmini-os 0.3 and openlibm 0.4

Also, don't build in debug mode (this disables all optimisations).
Merge pull request #4 from talex5/master

Upgrade to libmini-os 0.3 and openlibm 0.4
Add release upload command
Add MIME type to release upload
Fix the uploaded title