text: Title: Add friendly view of PyTables structured HDF5 files
  Body: pandas uses PyTables for HDF5 outputs.  This creates a lot of extra structure (which I don't totally understand) that makes it hard to view idomatically in visidata.
  
  "Unpacking" the PyTables schema would make this tool incredibly useful for peeking at HDF5 files created by pandas.
  