fixed compilation on gcc, tweaked and further cleaned up the code.
code tweaks and simplifications.
code tweak.
Added a few debug messages to the loading procedure
finished adding the loading hair test file
code cleanups.
tweaked code.
code tweaks and cleanups.
code optimization and cleanups.
many refactorings, optimizations and cleanups around the Bezier curves code.
Merge branch 'master' of https://github.com/appleseedhq/appleseed into branch_curve_bvh
finished writing code for creating a procedural curve file