Japanese terms for settings page

[maciej]

Thank so much to everyone who helped with the first set of translation
terms - that was incredibly fast!

I have updated our Google spreadsheet (https://spreadsheets.google.com/
ccc?
key=0Au7yiR802qQmdDNzbTdxQUQ5S1AyeFFhQTZYdnBWb3c&hl=en&authkey=CMSCiekF)
with some text from our settings page (http://pinboard.in/
settings/).

I will keep posting new sections of text while I work to make
localization work on the backend. With your help I hope to have a
first version of half-english/half-japanese Pinboard in about a week.