Fixed crash when rendering builtin projects
Merge branch 'master' into OSL_merge
rendermanager.py 2.7: fixed crash when no pings are available.
Merge branch 'master' into OSL_merge
Made lambertianbrdf OSL friendly. Register closures.
Fixed typo
Merge pull request #292 from est77/OSL_merge

OSL merge 4
fixed styling issues.
the "Quicksave All AOVs" button now generates both numbered and unnumbered image files.
rendermany.py: allow to forward additional arguments to appleseed, and to select the output format.
clarified the description of the --window command line argument.
improved adaptive pixel renderer.
small code reordering.
fixed minor visual glitch: the render widget was not repainted if rendering failed early.
coding style tweaks.
small code movement.
minor code tweak.
renamed <searchpath> and <searchpaths> to <search_path> and <search_paths> in project file format definition.
reordered code.
added get_class_uid() static methods to entities.