FIXES

• Occasional crash after undo/redo in the network editor while IPR is running
• Edit multiple nodes in the network editor
• Arnold Driver path can not be overridden with the -oimage command line flag
• Frame 0 has no padding in Arnold Driver using path from render settings
• Get/set Arnold Driver path in a python script
• Textures displayed in the viewport listed twice in Tx Manager
• Wrong render time of IPR shapshots in Picture Viewer
• Flat shader does not work on a Background object
• GV Reference shader loses references