Complete lesson 7.
Small additions to lesson 7.
Next lesson: graphing.
Rename a function.
Add missing space.
Move lesson source files into "source" directories.
Charting lesson mostly done.
Add chart demo iframe, plus minor changes.
Start writing about the comparison feature.
Add expand/collapse demo with jQuery.
A few lines about expand/collapse.
Describe the outline of a schema change.
Finish describing jQuery toggle.
Write up how two babies can be plotted on one chart.
Assorted fixes, few new paragraphs.
Describe storing annotations via Bootstrap Tokenfield.