Planets, stars should respect zoom level

Looks a lot less silly when you zoom in / out now.
Flip coordinate systems for sidebar views

Discovered the joy and pain that is -(BOOL) isFlipped on NSViews. By default,
all views will use graphics coordinates, which is unfortunate if you have content
that might want to resize down instead of resizing up.

This should make implementing animations for the sidebar MUCH easier.
animate sidebar

This became considerably easier with the - (BOOL) isFlipped method on NSView