ondrolexa/apsg: APSG 0.4.3 release

New in this release Stress tensor with few basic methods implemented StereoGrid keyword argument 'weighted' to control weighting StereoNet kwargs are passed to underlying methods for immediate plots StereoNet tensor method implemented (draw eigenlins or fols based on fol_plot settings) Group totvar property and dot and proj methods implemented Fol and Lin dot method returns absolute value of dot product Vec3 H method implemented StereoNet.contourf method draw contour lines as well by default. Option clines controls it. centered bug fixed StereoNet allows simple animations. Add animate=True kwarg to plotting method and finally call StereoNet animate method