Merge branch 'master' into next

Merge branch 'master' into next

* master:
  Update draft release notes to 1.7.8
  git-svn: Allow certain refs to be ignored
  git svn dcommit: new option --interactive.
  git-gui: incremental goto line in blame view
  git-gui: clear the goto line input when hiding
  git-gui: only accept numbers in the goto-line input
  git-gui: search and linenumber input are mutual exclusive in the blame view
  git-gui: deal with unknown files when pressing the "Stage Changed" button
  git-gui: drop the 'n' and 'Shift-n' bindings from the last patch.
  git-gui: Add keyboard shortcuts for search and goto commands in blame view.
  git-gui: Enable jumping to a specific line number in blame view.
  Fix tooltip display with multiple monitors on windows.
  Fix typo: existant->existent
  git-gui: updated translator README for current procedures.
  git-gui: warn when trying to commit on a detached head
  git-gui: Corrected a typo in the Swedish translation of 'Continue'