Update Annotator to b10dad7f (typed-packaging branch)
Implement multiple selection of annotations

Pressing Ctrl (or Compose), and clicking on a highlight,
or a tab on the heatmap now adds annotations to the current selection.
A second such clicks removes them agian.

k
Updated annotator to 04d14657 (fix-event-signature branch)
Follow Annotator API change
Updated annotator to 8b9bc0e (fix-event-signature branch)
Updated annotator to fca057ce (fix-event-signature branch)
Optimize xorToViewer: don't traverse twice. Kudos to @tilgovi
Rename `xorToViewer` to `toggleViewerSelection`
Merge pull request #1121 from hypothesis/1118-multiple-selections-3

Multiple selections