This release attempts to address some visual issues in the HTML output
Also introduces Percy.io to the test suite, for visual regression testing
Fixes:
* star symbols now display text version (fixes 16)
* some star symbols removed that break in Percy (math symbols)
* some star symbols added (ASCII puncutation)
* fix bug where charts where len(col) > len(star) presented duplicate legend blocks
Changes:
* use latest python for testing only (for now, to reduce percy costs)
* outputted image name is now the stem name (fixes issues with buffered output)
* outputted color now shows length of legend, and param input