removed stub file.
enable parsing by scripts/appleseed.gather.py.
fixed test program for standalone appleseed.foundation library.
fixed logo URL in README.md file.
updated link to MIT license in README.md file.
added alt to logo image in README.md file.
Unsorted stuff.
updated manifest for standalone appleseed.foundation library (version 1.7).
updated plugs for standalone appleseed.foundation library.
added test for foundation::Logger in standalone appleseed.foundation library test program.

fixed manifest and plugs to make the test pass.
wip OSL reflection / refraction.
fixed build error on OS X by removing unused functionality.
Specular BSDFs working in OSL.
Merge remote-tracking branch 'upstream/master' into OSL_specular_bsdfs
Added more comments.
Added reference image for simple glass scene.
Optimized the fresnel multiplier == 0 case. Removed some unused files.
Final cleanup.
Fixed a bug in refraction closure. Updated test ref image.
Small improvements to simple glass shader.