Csvviz

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- Can specify var titles with pipe-delimited syntax, e.g. ``-x 'fieldname|The field name'``

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- Removed (non-existent) Python 3.5 compat, fixed 3.6 & 3.7 compat
- Normalized area and bar charts with ``-N/--normalize``
- removed '-alpha' tag

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New chart types
^^^^^^^^^^^^^^^

- area
- hist (like bar charts, but for frequency count only)
- line
- scatter, which can act as bubble chart if ``--sizevar`` param is set


Grid (i.e. trellis/small multiples)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

For any chart type, use ``-g/--grid`` to specify variable to map chart multiples

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General
^^^^^^^
- Fixed total breakage

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General
^^^^^^^

- ``csvviz --version`` prints out version
- viz options
- --theme to set chart theme
- --json to output Vegalite chart specification in JSON
- --no-preview to not preview chart in browser (useful for testing)
- --interactive/--static to show an interactive chart or not (default is 'static')

cli.info
^^^^^^^^

- a command for general help and listing
- Show list of colors, colorschemes, themes, etc


cli.bar
^^^^^^^

- arguments and options
- x,y options accept integers (as strings)
- --fill/-s
- -H/--horizontal for horizontal bars (vertical columns is default)

- --colors/-c to set colors
- --color-scheme/-C to specify a color scheme

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cli.bar
^^^^^^^

- Minimally functional: ``$ csvviz bars -x name -y things examples/tings.csv``