Merge remote-tracking branch 'upstream/master'
exposed lights' and EDFs' cast_indirect_light and importance_multiplier parameters in appleseed.studio.
Merge remote-tracking branch 'upstream/master'
Enable threading for exr loading and saving
published the specifications of the BinaryMesh file format.
Added missing exr thread pool init in maketiledexr and minor formatting.
Merge pull request #255 from est77/exr_threads

Enable threading for exr loading and saving
implemented selection rendering in appleseed.studio.
fixed unit test.
Merge branch 'master' of github.com:jupiter-jazz/appleseed
fixed compilation (warnings) and some minor cosmetic issues.
right-aligned labels and improved spacing consistency in entity editor and material assignment dialogs.
added styling for the QSlider widget.
added DoubleSlider, a slider widget that supports floating point values.
added support for the "numeric" widget type that provides a text box and an horizontal slider for values input.
switched some widgets from "text_box" to "numeric".
minor formatting fixes.
fixed terminology: Render Selection -> Render Region.
added the "ui.render_region.triggers_rendering" setting to appleseed.studio to control whether or not defining a render region triggers rendering.
fixed migration code from revision 5 to revision 6: non-Blinn microfacet BRDFs were not properly updated.