Bug#677517: minetest 0.4 unstable version

[Matthew Bekkema]

I've decided it would be much easier to package the latest upstream
tag than to do what I was attempting earlier (package their latest
commit) so I have started again and packaged their stable-0.4.4
release and pushed the changes to my github repo.

I've also updated the watch file but it still needs work because uscan
thinks that 0.4.dev-20120122-1 is the newer than 0.4.dev-20120606.