moved the current viz to a subdir so an alternative model can be created at viz
moved back common files to viz
modified viz to add desktop as a separate element
added explanatory text to each slide
Moved 004.svg to viz as that too was common. it still needs work on the content display, but that's still common work.
Started working on viz for semantic zoom.
added idea of zooming in and showing autostart apps
added ideas about different ways to show running apps