DisneyLayeredBRDF work.
Merge branch 'master' into est_disney_material
Modify expression set in dinsey editor inputs

The color which should be found in the input of the disney material
editor must be transformed from sRGB to linear RGB.

Also the texture expression should be different. It should look like
texture("path", ...).

Signed-off-by: Marius Avram <marius.avram1309@gmail.com>
renamed ARCH32 and ARCH64 to APPLESEED_ARCH32 and APPLESEED_ARCH64.
Curve Rendering PR Commit - Basic Curve Loading - Curve Tree - Rendering with materials and shadows
Merge pull request #479 from sriravic/curve_upstream_PR

Curve Rendering PR Commit - Basic Curve Loading - Curve Tree - Rendering...
Merge branch 'master' of github.com:appleseedhq/appleseed
fixed comment and minor cosmetic tweaks.
added a comment.
minor code reordering.
Fixed some minor issues
Merge pull request #480 from sriravic/curve_upstream_PR

Fixed some minor issues
APPLESEED_ARCH32 and APPLESEED_ARCH64 are now defined in foundation/platform/arch.h.
minor formatting tweaks.
minor edit.
Merge branch 'master' of github.com:appleseedhq/appleseed
remove redundant definitions of APPLESEED_ARCH32 / APPLESEED_ARCH64.
more work.
Fixed gcc 4.7 compile error
many small fixes and cleanups around the new curves feature.