added ja localization for "Needs Auth" string for 10.8 or earlier.

[hkurosawa]

• Added missing localization text ("needs authorization" for 10.8 or earlier)
• AUTHORIZATION_INFORMATIVE_TEXT_* key string to original string. for mentioned at Previous Window #132.

[fikovnik]

Thanks a lot! I merged it in however I found a problem (actually reported by @kojiishi). The thing is that the localization duplicated all XIB files and thus it would require to sync multiple XIBs. This would resulted in a quite a bit of an overhead. I updated the localization to use base i18n. The idea is to have one XIB and then use .strings file for the localization.
The 07fbdb3 commit contains these changes. Please have a look at it and check if it works or not. Thanks!

[hkurosawa]

Thank you, I think the base i18n method would be better!

I've checked the commit and found some problem.

1. PreferencesWindow needs to "Builds for Project Deployment Target(10.8)" for PreferencesWindow.strings to take effect - I'm not sure if it's ok to change the build setting.
2. PreferencesWindow.xib(Base) needs more space -- I had modified the japanese xib layout to fit with Japanese string width which is xib at b4befb6 .

Thanks!

[hkurosawa]

just made a pull request for these issues at #141