Pymandel

CHANGES:

1. Minimum versions of numba, numpy and Pillow updated.
2. shields.io build status badge URL updated.
3. Python 3.6 removed from workflows.

No other functional changes.

ENHANCEMENTS:

Number of significant enhancements in this release:

1. Set mode and variant categories separated, allowing Mandelbrot and Julia modes for each variation Standard, Burning Ship and Tricorn. Julias mapped from the Burning Ship's 'keel' are particularly attractive.
2. Linear color interpolation added to colormap rendering, producing much smoother color gradients.
3. Periodicity checking added to fractal calculation routine, dramatically improving rendering times for plots which feature substantial 'in set' (black) points.

FIXES:

1. Fixed bug in mandelpycli command line utility that was skewing the zyoffset coordinate. Also minor improvements to metadata import.

NB: If you have old (pre 0v1.0.0) metadata json files, they'll need amending to change the header element from mandelpy to pymandel - see examples in images folder.

ENHANCEMENTS:

1. Further console script entry points added for pymandelcli and make_colormap CLI utilities. These utilities can now be launched via simple pymandelcli and make_colormap commands.

ENHANCEMENTS:

1. Console script entry point added to setup.py, so application installed using pip can now be launched via a simple pymandel command as an alternative to python -m pymandel, provided the Python 3 scripts/bin folder is in the user's PATH.

ENHANCEMENTS:

1. Numba now supports Python 3.9. Minimum numba version updated to 0.53.0.
2. Numba & numpy versions cited in About dialog.