Update Japanese (ja) l10n
update email address
Merge pull request #50 from kyoshino/locale-ja

Update Japanese (ja) l10n
Commit from Mozilla Verbatim by user michael.koehler1@gmx.de.: 80 of 80 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user ouesten.: 80 of 80 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user Mikk.: 76 of 80 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user markh@babelzilla.org.: 80 of 80 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user sara.todaro@mozillaitalia.org.: 80 of 80 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user jasnapaka@jasnapaka.com.: 80 of 80 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user petercpg@mail.moztw.org.: 80 of 80 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user tonnes.mb@gmail.com.: 80 of 80 strings translated (0 fuzzy).
allow users to unsub from threads they are not devs of (bug 931226)
only show unsub on main listing
Commit from Mozilla Verbatim by user kelemeng.: 80 of 80 strings translated (0 fuzzy).
Updated Russian localization
Merge pull request #51 from unghost/20140412_ru

Updated Russian localization
Commit from Mozilla Verbatim by user inma610.: 80 of 80 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user valastiak@mozilla.sk.: 80 of 80 strings translated (0 fuzzy).