fixed migration code from revision 5 to revision 6: non-Blinn microfacet BRDFs were not properly updated.
fixed occasional crash when applying gamma correction (unaligned local variable accessed by SSE instructions).
fixed computation of accumulation buffer levels dimensions when one dimension of the frame was smaller than 32 pixels.
added OVERRIDE keywords.
appleseed.cli's --display-output command line option will now work if an output is specified (using --output or -o) even when autosave is disabled.