Anamorphic SD (16:9) support in GenCG

GenCG's main canvas for building pages can be visualized in 4:3 or 16:9, regardless of the video resolution. If you are working in NTSC, go to View and select 16:9 <-> 4:3. This will create a widescreen canvas for you to build your pages on. Please note this feature does not correspond with your NTSC 4:3 video output and is only for viewing/editing purposes only.