Clearer Annotations

[shaunlebron]

Something I picked up from the Tufte class is to show all the data and make it as clear as possible by annotating it in-place. Thoughts:

• Node duration: move the time duration below each node level, with a horizontal line extending to ends of the node: ━━━━ 128 years ━━━━
• Cell duration: label the cell duration by showing a square to the left of each node level, annotated it with its duration ▢ = 2^52 ns
• Virtual cells: display a label with dynamically aggregated below the shadowed cells and show cell duration next to the virtual cell horizontally aligned with those of the node levels.
• Relative scale: draw curved arrows from a cell duration label to the one above and annotate it with ×2, ×4, ×8, ×16, ×32, or ×64