v0.2.0

Added

• Plot kinds
  • barh: horizontal bars, first category on top. y and z are grouped like bar.
  • kde: smooth density curves (Gaussian KDE in numpy, no scipy needed), one per array.
  • ecdf: empirical CDF, the share of values at or below each x, one step curve per array.
  • box: box plots side by side (median, quartiles, 1.5 IQR whiskers, outliers), one per array.
  • violin: violin plots side by side with the median and quartiles marked, one per array.
• Flags
  • stack now works with bar and barh: z is drawn on top of y, so the bar's end is the total.
  • stack, norm (density) and the new cum (cumulative) work with hist.
• kx.plot(..., by=groups) splits x into one curve, box or violin per group (for kde, ecdf, box, violin).
• cmocean colourmaps thermal, haline, deep and balance for kx.use(cmap=...).
• Crameri colourmaps (Scientific colour maps 8) batlow, lipari, hawaii, oslo, davos, vik, roma,
  bam, cork and cyclic romaO, vendored the same way.
• kx.use(cmap="<name>_r") reverses any colourmap in kx.cmaps().
• Palettes tollight (Paul Tol), set1 and paired (ColorBrewer) and tab20 (Tableau, 20 categories).

Changed

• hist puts every series on the same bins, so overlaid bars line up.