Tweaks

• Japanese localisation tweaks
• bootup should be a little faster on OSX
• overall improvement of network stability

Fixes

• Game would crash on start about 1 on 5 times with OSX 10.7
• OSX version crash pretty often when connecting to a multiplayer game
• updated SDL2 libs on OSX (there was some outstanding issues)
• matchmaking now use network protocol versionning instead of the version of the game, which means MAC and WIN user will get matched in public games.
• Potential fix for obscure NVorbis crashes on WIN