Fix scoping issues when evaluating $vpt, $vpr, $vpd.
Match gimbal camera orientation with values shown in GUI.
Setup camera distance for both perspective and orthogonal mode.
Update camera settings for camortho test and update reference image.
Test case for UTF-8 include / use (issue #875).
Merge pull request #876 from openscad/issue875-testcase

Test case for UTF-8 include / use (issue #875).
Merge pull request #856 from openscad/fix-viewport-scoping

Fix viewport variable scoping
Less verbose irc output from travis
Activate scan.coverity.com integration.
Skip unit test run after coverity scan.
Add Coverity Status badge.
bugfix: don't crash on empty resize(). refactoring: added virtual copy() to geometry, moved resize() to CGAL_Nef_polyhedron. Fixes #862
Merge branch 'master' of github.com:openscad/openscad
Don't crash on infinite dimensions. Fixes #859