Ignore visibility change events when the window is closing (fixes #812).
Merge pull request #833 from openscad/fix-visibility-behavior

Ignore visibility change events when the window is closing (fixes #812).
Disable failing test on Ubuntu 12.04 Gallium drivers
Merge branch 'master' of github.com:openscad/openscad
Rewrote csg-import-test to be able to export other file formats as well as pass extra parameters to OpenSCAD
Bugfix - png is the last arg + some better error output
Pass full path to python script
Allow other files than .scad as input