Fix some paths for Mac and add translations to bundle

'share' is under Subsurface.app - you don't need a 'subsurface' directory
under 'share'.

This also installs the processed translations.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Work around a Qt Locale bug on Mac

With Qt4.8.5 Locale::uiLanguages() sometimes doesn't return the country, just
the language. This works around this by recreating the locale if this has
happened.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Try harder to find the translation files

They could be below the data directory ("share") or next to it.

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

This runs lrelease against the .ts files and automatically recreates the .qm
files if any of the .ts files changes.

This also moves the .ts files into the translations directory.

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