Ignore the Subsurface.app folder

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Better diagnostic message when not finding translations

This way we know where the program was looking for the files.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Install qt translations into Mac bundle

This is much harder than it should be...

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>