This release focuses on graphics and a few user-reported bug fixes

New features
============

* `bins` computes frequency bins from statistics data
* `Res` sets the resolution when plotting
* `HistogramPlot` draws a histogram (frequency) plot from an array
* `HSV` generates a color pattern from hue, saturation and value
* `Color` generates a color pattern from an object, including names
* `TruthPlot` renders a truth value plot, with grayscale and color options
* Add a new `XYPlots` demo illustrating `TruthPlot` variants

Bug fixes
=========

* Update the screen in `Show` when `Pict` is set
* Fix crash in `Date+` when adding invalid dates
* Correctly update the `UserModeMenu` and annunciator when changing User mode
* The `STO` operation now works sensibly on flags
* Fixed a rare on-startup crash running tests in the debugger
* Invalidate the font cache when changing settings (notably `FixedWidthDigits`)
* Fix transient `Input` validation errors after text-editor errors
* Remove two extra parentheses in the documentation for settings

Improvements
============

* Transient Alpha now preserves existing Alpha / Lowercase mode
* Remove dependency on external `crc32` utility, now use a local implementation
* Remove dependency on `tac`, replace it with `tail -r`
* Rendered graphics are now preserved in case of auto-power-off
* Avoid transient build errors on missing help directory
* Add documentation for `ResetModes` and usage example for `Modes`
* Negative dates now show as `BC` instead of with a minus sign

Signed-off-by: Christophe de Dinechin <christophe@dinechin.org>