renamed a private member.
tweaked warning message.
fixed compilation with gcc.
Merge branch 'master' into OSL_merge
aovs now have an alpha channel.
Merge pull request #296 from est77/OSL_merge

OSL merge 5
minor styling and cosmetic fixes.
minor coding style tweaks.
minor coding style tweaks.
the Import Objects file dialog now show *.binarymesh files.
Merge branch 'master' into OSL_merge
rendermanager.py 2.8: many improvements.

- fixed handling of dependencies when rendering multiple shots concurrently.
- the render manager can now be terminated (by pressing CTRL-C) during updates of the dependency databases.
- only print pings for machines rendering the current shot.
- fixed crash when the log file for a given machine does not exist.
Merge branch 'master' into OSL_merge
implemented ray types.
rendermanager.py 2.9: fixed crash when multiple log files were missing.
Adding a ref to OSL's shading system in shading context.
Merge branch 'master' into OSL_merge
Some changes required to execute OSL shaders.