BUGFIX: Fix Cosmo64 reader names/labels

Put Cosmo64 core reader in a different proxy group to
disambiguate it from the vtkFileSeriesReader. Also, removed
all labels. Now, the name of each property is used to also
define its label s.t. both python/C++ interfaces have the same
access patern.
BUGFIX: Fix Cosmo64 reader names/labels

Put Cosmo64 core reader in a different proxy group to
disambiguate it from the vtkFileSeriesReader. Also, removed
all labels. Now, the name of each property is used to also
define its label s.t. both python/C++ interfaces have the same
access patern.

git-svn-id: https://svn.alcf.anl.gov/repos/DarkUniverse/hacc/trunk/cosmotools@1452 952bdfbe-fa2e-45c0-a9ae-ac90d4a62daf
Merge branch 'svn/cosmo64reader-updates'