piecwise linear segments. These are piecewise linear approximated for display, and currently for the mesh too, but that's the first step to replace the mesh with exact curved surfaces. [git-p4: depot-paths = "//depot/solvespace/": change = 1895]
add framework for additional vector output formats (ps, pdf). [git-p4: depot-paths = "//depot/solvespace/": change = 1893]
such a file, but mailers might mangle them. [git-p4: depot-paths = "//depot/solvespace/": change = 1891]