mid3v2: setting multiple values/frame; deleting and setting frames at the same time (with PATCH) about mutagen HOT 9 CLOSED

Don't know if Joe is looking at "Fixed" issues, so I made a new issue#50 out of it.

Note that the bug I introduced with r69 only appeared when actually using the new
functionality, for example assigning multiple genres. In that case the bug is fatal, but at
least it is not a regression.

There was a problem with my patch. I'm sorry! I've never coded python before. Here is a fix:

This issue was closed by revision r69 .

Good point. How's the attached?

Note that the biggest part of the attached diff is just an indentation change: the block
between 

   values = value.split(":")

and

   encoding=3, text=value, lang=lang, desc=desc)

is now within a loop over vlist.

I am unclear where the atomic_types variable is supposed to come from. Can you change
that whole bit so the edits dict just always holds the right type, and we don't need
to postprocess the preprocess?

Okay, here is (as far as I can see) the final version of this patch.

I reversed the order of applying the "--delete-frame" and "--FRAME=value" operations.
It makes more sense to first apply the deletes, then the writes. This way a script can
first summarily delete all occurrences of certain frames, and then add the correct
values back in.

Sorry, got a mistake when I refreshed my diff against SVN, here is the corrected
version