Scroll to anchor, more semantic anchors, corrected insertion point

Note anchors are now figures containing links, and will open the tab
pane at their note number, rather than at the top.

In addition, note anchors are now placed as the first child of the
element containing the [data-notation] attribute. This fixes float
errors.
Rejigged style to reflect new markup of note anchors

Classes now applied to figure element, and styles applied anchor link.
Added a few more notes to test scroll to function

An additional three or four notes to test the scroll to within the
notes tab
Merge branch 'scroll-to-anchors'