python-gpod should depend on python-eyed3

Binary package hint: python-gpod

from a shell :
$python
Python 2.5 (release25-maint, Mar 7 2007, 18:05:18)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import gpod
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/site-packages/gpod/__init__.py", line 9, in <module>
    from ipod import *
  File "/usr/lib/python2.5/site-packages/gpod/ipod.py", line 10, in <module>
    import eyeD3
ImportError: No module named eyeD3

This bug silently disables iPod support in quodlibet (as import gpod returns an error which is silently ignored).