TODO

   1 Allow placement:
   2
   3  0010L-hello.html   +-----------+-----------+
   4  0010R-hello.html   |           |           |
   5                     |     L     |     R     |
   6                     |           |           |
   7                     +-----------+-----------+
   8
   9 similarly 'A' (above) and 'B' (below).
  10
  11 Allow placement across monitors.
  12
  13 Allow talk notes to be placed permanently on one monitor (is this
  14 useful though?  speaker could just open an editor with the notes
  15 separately).
  16
  17 Fix Gtk2::Embed so it doesn't keep crashing and so we can
  18 run everything in a single process.