Merge branch '1.0.x' into qna

* 1.0.x: (26 commits)
  Fix typo in documentation.
  Fix i18n.
  Change formatting of i18n slightly. Translator hints were not picked up in pot file. May now they are.
  Localisation updates from http://translatewiki.net.
  Translator documentation updated. i18n/L10n updates. Superfluous whitespace removed. Add FIXME for missing class documentation.
  Update translator documentation. Remove superfluous whitespace. L10n/I18n updates. FIXMEs added for missing documentation or headers.
  Update translator documentation. i18n/L10n updates. Superfluous whitespace removed. Add FIXME in files with missing documentation.
  Fallback for RSVP display when Event is deleted
  Enhancement for 'ajax' form class: submit buttons behave more like normal submissions, submitting their name/values through a hidden field.
  Retool group join queue list ajax forms to use two buttons in one form, making it more ajax-submit-friendly. Needs util.js fixes for AJAX submission input buttons...
  Some fixes to make the notice stream class work
  let Inbox class go fingerpokin' in streams
  New NoticeStream class to reify streams of notices
  Refactoring on notification mail generation: common profile & footer chunks pulled out, notifications added for group joins.
  Fix typo in cf45c978
  Mass replacement of #-comments with //-comments
  Add pending members list to group navigation, if group has joins moderated or if it has pending requests open
  Split up some list/form classes, and get the 'approve' and 'cancel' links on group member queue working.
  Pending members queue list -- doesn't yet allow approval.
  Logic to have group joins turn into pending joins automatically when group is set to mod; allow users to cancel their pending group requests.
  ...