Commit from Mozilla Verbatim by user kohei.yoshino@gmail.com.: 38 of 38 strings translated (0 fuzzy).
Remove things we don't need (bug 1046577)

- Our search box has a placeholder, no value text (and is not in the header)
- We don't have users
- We don't have a back button
Remove more useless (unused) code (bug 1046577)
Commit from Mozilla Verbatim by user petercpg@mail.moztw.org.: 38 of 38 strings translated (0 fuzzy).
Merge branch 'master' of github.com:mozilla/discoplace
Commit from Mozilla Verbatim by user kohei.yoshino@gmail.com.: 38 of 38 strings translated (0 fuzzy).