Make translation failure error out, there are at least 1 uncovered translation failures (share with lightbox)

this may be temp.  i want to see if ci passes; Revert "I18n:  Workaround for a weired caching issue when multiple users are logged in"

This reverts commit dfa5d875.

crazy ugly admin interface so an admin can invite people, and search for user accounts for basic debugging

Merge branch '680-error-on-login-goes-away-quickly' of https://github.com/grzuy/diaspora into flashmsg