Added cumulated transform sequence, to make it easier to implement object coordinate systems.
Save accumulated transform sequence in assembly instances.
Merge remote-tracking branch 'upstream/master' into OSL_objectspace
Merge remote-tracking branch 'upstream/master' into OSL_objectspace
Merge branch 'master' into OSL_objectspace
Split computation of accumulated transforms for assemble instances.
Object space transforms working. Updated OSL scenes with refs.
Merge pull request #415 from est77/OSL_objectspace

Store the accumulated transform sequence from worldspace in assembly instances.