Renderer : Release GIL during rendering
Renderer : Release GIL during rendering

Up-coming support for adding specific message handlers from Python
may result in logging from other threads.

boberfly/gaffer,GafferHQ/gaffer,lucienfostier/gaffer,andrewkaufman/gaffer,lucienfostier/gaffer,andrewkaufman/gaffer,hradec/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,GafferHQ/gaffer,hradec/gaffer,lucienfostier/gaffer,ImageEngine/gaffer,hradec/gaffer,andrewkaufman/gaffer,boberfly/gaffer,hradec/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,boberfly/gaffer,johnhaddon/gaffer,johnhaddon/gaffer,boberfly/gaffer,hradec/gaffer,lucienfostier/gaffer