Gnuplotlib

* Improved default svg terminal settings
* Added add_plot_option() function, more robust plot option parsing

-- Dima Kogan <dkogandebian.org> Sun, 08 Nov 2020 01:33:03 -0800

* Lots of updates to the guide contents, and to the way it is built
* I now barf if both "_key" and "key" are given in any set of options
* Reduced the uninteresting complaining at exit with ipython
* Any curves where ALL the data arrays are empty are ignored

-- Dima Kogan <dkogandebian.org> Sat, 19 Sep 2020 20:28:11 -0700

* BIG documentation update. Added the "guide": a tutorial and set of
demos.
* License change: any version of the LGPL instead of LGPL-3+

-- Dima Kogan <dkogandebian.org> Sat, 14 Mar 2020 23:22:27 -0700

* Major rework: support for multiplots. No breaking changes
* All errors raise a specific GnuplotlibError instead of Exception
* tuplesize<0 works with single points
* added convenience plot options square-xy and squarexy as synonyms for
square_xy
* "square_xy" works in 2D: synonym for "square"
* "hardcopy" and "output" are now synonyms
* Makefile uses python3

-- Dima Kogan <dimasecretsauce.net> Thu, 28 Nov 2019 18:50:02 -0800