Merge branch 'workshop'
Merge branch 'workshop'
Merge branch 'workshop'
Update INSTALL_LINUX.md

Update documentation for builders.
Merge pull request #138 from sobotka/patch-1

Update INSTALL_LINUX.md
Update README.md
Update README.md
Fix conflicts
Merge branch 'multiCoreOpt' of github.com:MrKepzie/Natron into multiCoreOpt
Merge branch 'multiCoreOpt' of github.com:MrKepzie/Natron into multiCoreOpt
Fix a few bugs/warnings