production release v2023a_6 available

[Jeremy Faden CS]

I've updated the production release to include a few new features since
the last release, but also fixes a bug new bug which was in there.  The
last release wouldn't properly reset the plot type if necessary, for
example if you sliced a spectrogram it would show an error instead of
properly switching to a series line plot.  New features include a few
new colorbars to support angles where 0 and 360 are identical, and a new
option to write PNG Walk annotations (quality control) to a single csv
file.  Also the ticks algorithm for log axes now considers the length of
the axis, reducing the number of ticks when the axis height is small enough.

This is the release at http://autoplot.org/jnlp/latest/, which includes
Webstart, exe for Windows, dmg for Macs, and .deb and .rpm releases for
Linux.  Let me know how this is working for you!

Jeremy