Adding --verbosity to read_urqmd_pandas.py
Getting rid of NaturalNameWarning messages of PyTables

Our DataFrame has columns with the names 2i3 and lcl#.
Those aren't proper Python variable names and thus PyTables complains:

.../site-packages/tables/path.py:100: NaturalNameWarning: object name is not a valid Python identifier: '2i3_kind'; it does not match the pattern ``^[a-zA-Z_][a-zA-Z0-9_]*$``; you will not be able to use natural naming to access this object; using ``getattr()`` will still work, though
  NaturalNameWarning)
.../site-packages/tables/path.py:100: NaturalNameWarning: object name is not a valid Python identifier: '2i3_dtype'; it does not match the pattern ``^[a-zA-Z_][a-zA-Z0-9_]*$``; you will not be able to use natural naming to access this object; using ``getattr()`` will still work, though
  NaturalNameWarning)
.../site-packages/tables/path.py:100: NaturalNameWarning: object name is not a valid Python identifier: 'lcl#_kind'; it does not match the pattern ``^[a-zA-Z_][a-zA-Z0-9_]*$``; you will not be able to use natural naming to access this object; using ``getattr()`` will still work, though
  NaturalNameWarning)
.../site-packages/tables/path.py:100: NaturalNameWarning: object name is not a valid Python identifier: 'lcl#_dtype'; it does not match the pattern ``^[a-zA-Z_][a-zA-Z0-9_]*$``; you will not be able to use natural naming to access this object; using ``getattr()`` will still work, though
  NaturalNameWarning)

I found the fix on
https://www.mail-archive.com/pytables-users@lists.sourceforge.net/msg01130.html