[calibre/f19] (15 commits) ...Update to 1.21.0

[Kevin Fenzi]

Summary of changes:

  c1f94bc... Update to 1.9.0 (*)
  e849e8b... Cleanup (*)
  1fb8f7f... Unbundle MathJax (*)
  f4bf5f4... Fix the installation of shell completion scripts (*)
  fc589bb... Fix exception in shutdown (*)
  3cf245e... Fix bash completion directory detection (*)
  a52e791... Fix upgrade path (*)
  dab5a70... Update to 1.11.0 (*)
  e8d1757... Update to 1.13.0 (*)
  db527d7... Update to 1.14.0 (*)
  9228dcd... Update to 1.17.0 (*)
  7236efb... Update to 1.19.0 (*)
  fb4d60e... Update to 1.20.0 (*)
  713d700... Add appdata (*)
  5204ee7... Update to 1.21.0 (*)

(*) This commit already existed in another branch; no separate mail sent