use the CGAL triangulation with intersections enabled. attempt to fix issue #159
print only a single warning about intersecting vertices at dxf tessellation
, instead of spamming it over and over. also mention that it might be
due to intersecting lines, not just duplicate vertices (duplicate vertices
being perhaps generated by cgal's tessellator when it deals with intersecting
lines)
fix print statement
Capitalize 'duplicate'
new test results (degenerate polygons produce output)
add wrapper code from nop head, mod build scripts
rewrite wrapper using popen. add 1 name to abt dialog
documentation fixup
add another to About dialog
Merge pull request #251 from openscad/windows_console

Windows console. Marius gave approval for Merge in Issue discussion.
fix bugs and rewrite GLEW finding code to be more clear.
Merge branch 'master' of github.com:openscad/openscad into issue159
make it clear to the user that they can't rely on this behavior
fix pkg-config to actually work
if we are on linux/BSD and there's no X running, try Xvfb automatically.
also workaround some Gallium bugs and Imagemagick bugs
Merge pull request #257 from openscad/build_better2

Tests: if we are on linux/BSD and there's no X running, try Xvfb automatically.
Merge pull request #256 from openscad/glewfix

fix bugs and rewrite GLEW finding code to be more clear.
Merge pull request #255 from openscad/issue159

Issue159
sync
cosmetics