109.35.00

- Added new module `Textutils.Text_graph` for plotting text graphs on
  a terminal.

  Her is an example density plot for `minor_words` from
  `mcquote-stats.data`.

  ```
  (354 (3%) values outside the range, bucket size is 38.58)
      74.00     3786 |----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----|
     112.58        0 |
     151.17        0 |
     189.75        0 |
     228.33        0 |
     266.92        0 |
     305.50        0 |
     344.08        0 |
     382.67        0 |
     421.25        0 |
     459.83     3653 |----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+-
     498.42        4 |
     537.00     1055 |----+----1----+----2----+--
     575.58      308 |----+---
     614.17       70 |-
     652.75      404 |----+----1
     691.33       71 |-
     729.92       32 |
     768.50       18 |
     807.08      151 |---
     845.67       17 |
     884.25        4 |
     922.83        8 |
     961.42       66 |-
    1000.00        0 |
  ```

  Each `-` is approximately 37.860 units.