v2.3.0

Added

• vvplot --eps option for fine-tuning streamlines, vorticity and
  pressure fields smoothing factor.

Fixed

• Building instructions.
• Compilation errors with GCC 13.

v2.2.2

Added

• Savonius shape generation for vvcompose.
• Binary packages for ubuntu jammy (22.04).

v2.2.1

Fixed

• Upload packages for ubuntu focal and groovy.
• Revise the readme.

v2.2.0

Added

• New vvplot option -U for plotting a velocity field.
• New vvplot option --load-field for plotting side-prcessed fields.

Changed

• Replace libmatheval processor with Lua.
• Build (almost) all third-party libraries statically.
• Move CI from Bitbucket to the GitHub.
• Replace googletest testing framework with cppunit.

Fixed

• Segmentation fault in vvplot due to stack-use-after-scope bug.