3.1.1

[Dirk Hohndel]

test binaries available as

http://subsurface.hohndel.org/downloads/outbox/Subsurface-3.1-11-g45881c7e73e5.dmg
http://subsurface.hohndel.org/downloads/outbox/subsurface-3.1-11-g45881c7e73e5.exe

These contain just a few fixes since 3.1, updated translations and most
importantly the latest libdivecomputer version (so they should work with
OSTC3 and the latest firmware of the OSTC2)

/D