Merge branch 'master' of github.com:loomio/loomio into bug/fix-motion-close-at

* 'master' of github.com:loomio/loomio: (27 commits)
  fix missing translation
  flash error when incorrect amount in contributions
  improve how we send discussion ids to server for inbox activity counts
  Implement INBOX BABY!
  add language selection to sign up form; add greek locale
  Implement Pay what you can payment system
  spelling mistake in motion closing soon email
  update es.yml to match transifex version
  Revert "Split locale files into smaller sections"
  remove extra styling from emails
  Split locale files into smaller sections
  Tiny improvements to admin panel
  use default fonts for email
  Use GroupsTree on the side pannel of the homepage
  Improve group requests admin page
  Fix problems with GroupRequest states
  Add email host to staging environment
  Add approved_but_not_setup scope to admin group_requests
  Fix group full_name migration
  Repopulate Groups full_name field
  ...