v1.20.0

New features:
- find TODO flags in LaTeX code
  commit 991b4c64a55c145fd1771d42923ffac41aadcd86
- hide file prefixes a/ and b/
  commit 05e26c813ce557c3a6f4372d0bddc3ca8566f8dd
  commit 12cf6052ab88802ad63dde9e4f2e01cb5286b874

Bugfixes:
- when opening a file, use the file name after the commit instead of before the commit
  commit 6103d298f1261840a6c444fc4c101cdaed955685
- decode the name the file has after the commit
  commit 6103d298f1261840a6c444fc4c101cdaed955685
- decode file name in "rename from" and "rename to" lines
  commit ab6070cb086f2fb14fc7c1f593469bb53975b8ed