ftp updates (Xen 4.6, ruby 2.1, packages removals)

[Jan Rękorajski]

Hi,
I just moved ~700 packages from test to ready, among them:

- Xen 4.6.1 - please test, this version removes xend
- ruby 2.1
- ffmpeg 3.0 and almost all dependant packages


On a related note, the following packages will be removed soon:

- cinelerra-cv - CV is dead, unmaintained project
- mpeg4ip - dead project, no upstream updates for 9 years

If you really want to keep those, be prepared to maintain them,
as every time their deps change fixing them is a RPITA.