PuffinPlot version 1.4.1 released

Version 1.4.1 of PuffinPlot has been released. This is a relatively minor update, produced to fix bugs in the 1.4 release (most seriously, a bug which broke the Mac OS X app). It also adds two new plot type (RPI/depth and VGP map). The release is available for download at https://github.com/pont-us/PuffinPlot/releases/download/version_1.4.1/puffinplot-1.4.1.zip . New features added since version 1.4 are summarized in the release notes.