Adding shader class, extending containers to handle OSL related classes, fixed assembly's on_frame_begin.
updated packaging script: we no longer ship any demo scene.
updated install target: we no longer ship demo scenes.
removed third party libraries from repository.
appleseed.package.py 2.3.6: remove API reference documentation from package.
Merge branch 'master' into OSL_merge
Fixed many PR comments, simplified param parsing from XML files.
fixed compilation on 32-bit linux with gcc.
fixed compilation on 32-bit linux with gcc.
fixed compilation on 32-bit linux with gcc.
Refactor param parse code, add projectfilereader support for osl classes.
Improved tests, formatting fixes and bug fixes.
Don't terminate the app in case of OSL param parsing errors.
Fixed more PR comments.
Merge pull request #301 from est77/OSL_merge

OSL merge 8
fixed formatting.
Merge branch 'master' of github.com:appleseedhq/appleseed
fixed formatting.
removed debugging leftovers.
fixed formatting plus other minor cosmetic fixes.