Hi Guix,

I'm sending two patches to update eyed3 to version 0.8 (and switch it 
over to python3).  This patch adds grako, a new requirement for eyed3 
0.8.

Question: do we need a python2 variant for every python package?  At 
the moment, eyed3 is the only package using grako, and I've switched 
eyed3 to python3.  I think it's OK to leave out the python2 versio of 
grako then (we can always add it if a future package needs it)?  For 
now I included it in the patch.

Thomas