Link to Travis builds from README
fixup issue 593
Create freenode-verification.txt
removed temporary file
fixup 593 revised
Made executable
Merge branch 'issue593' of git://github.com/tim-caper/openscad
Merge pull request #608 from tim-caper/issue593

fixup issue 593
Merge pull request #577 from hroncok/patch-5

Link to Travis builds from README
Merge branch 'master' into unstable
Merge branch 'minkowski2_bug' of git://github.com/OskarLinde/openscad into unstable
Merge branch 'unstable' of github.com:openscad/openscad into unstable
Merge branch 'unstable' of github.com:openscad/openscad into unstable
fix issue 629 - dont run sudo automatically as it can harm some systems
fixup issues 440 441 479
Merge branch 'unstable' of github.com:openscad/openscad into unstable
Merge branch 'master' of github.com:openscad/openscad
Remove automatic validity check at end of render

In more complex cases, the final Nef_Polyhedron is_valid check() took up to 30 % of the total rendering time just to be able to say Valid: YES. In the case of cached geometry, the validity check was totally dominating the execution time when doing a render. This patch removes the automatic validity check, instead adding a menu command "Check Validity".
Fix positional arguments for polyhedron (fixes #634).
Merge pull request #636 from openscad/issue634

Fix positional arguments for polyhedron (fixes #634).