MathGL: version 8.0 (Stable) released

MathGL library makes wide spectrum of mathematical graphics (plots, surfaces, contours, isosurfaces and so on) in platform independent way. Graphics may be exported to EPS, SVG, PNG, JPEG, GIF or IDTF formats. Front-end for library is based on FLTK, Qt and/or GLUT libraries. Also it is possible to draw plot in console regime directly to the file (bitmap, PostScript or SVG) without using X-server. Output graphics is adopted to use with wxWidgets, Qt and other libraries.

New version 8.0 contain a number of improvements:
Change version numbering according Debian rules.
Add accurate line segment and quadrangle/triangle face cutting at axis border crossing.
Add fastcut for disable accurate but slow line/trig/quad primitives cutting at axis borders.
Restore back transparent background by default. You can set non-transparent background by using clf or background functions.
Compatibility changes for Qt5.15 and MSVC.
INCOMPATIBLE:
Change colorbar C-functions by adding last argument for options.
Add alpha-value in background.
Disable Qt4 interface by default.

[Alexey Balakin]

There is minor update v.8.0.1 which contain increase accuracy at line segment skipping, changes in SOVERSION numbering, minor spelling fix.