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.
Fix text() CSG output and cleanup test cases.

- enable text feature in import-export test cases
- drop ParaType font as Liberation is needed for the composition regression
  test, so use this for other tests too
- drop Amiri bold font, which is not adding anything to coverage
Add paste button to font list dialog.
Add filter for font table.
Enable text for most test cases and update reference images.
Read font index from fontconfig and check result from FcPatternGet().
Accept Macintosh/Roman charmap and always dump charmaps (as debug output).
Merge pull request #871 from openscad/text-fixes-3

Text fixes (part 3)
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