Fix PVDXY and rename DZ to PVDZ

Apparently I forgot to do this in my last PR. Also re-removed some branches that were overzealously added back into miniAOD ntuples.
Fixed

On Mon, Sep 8, 2014 at 9:57 PM, Austin Belknap <notifications@github.com>
wrote:

> In .gitignore:
>
> > @@ -4,7 +4,6 @@ CVS
> >  *.png
> >  *.C
> >  *.tex
> > -*.json
>
> I'd leave this be, actually. You can still have Git track JSON files with git
> add even if JSON files are ignored. Ignoring them only prevents untracked
> JSON files from showing up in git status.
>
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