Revert "add automatic <br> back to field references"

This reverts commit 05a68488e7cc27c330d81a9768f37eb19294616f.
don't try to rebuild old media dir on .anki import
Merge branch 'master' of github.com:dae/anki into flake
Merge remote-tracking branch 'ospalh/flake' into ospalh-special