Merge git://repo.or.cz/git-gui

Merge git://repo.or.cz/git-gui

* git://repo.or.cz/git-gui:
  git-gui: Reenable staging unmerged files by clicking the icon.
  git-gui: Support the encoding menu in gui blame.
  git-gui: Optimize encoding name resolution using a lookup table.
  git-gui: Allow forcing display encoding for diffs using a submenu.
  git-gui: Add a menu of available encodings.
  git-gui: Cleanup handling of the default encoding.
  git-gui: Assume `blame --incremental` output is in UTF-8
  git-gui: Use gitattribute "encoding" for file content display
  git-gui: Add support for calling out to the prepare-commit-msg hook
  git-gui: Hide commit related UI during citool --nocommit
  git-gui: Add more integration options to citool.
  git-gui: Updated German translation.
  git-gui: I18n fix sentence parts into full sentences for translation again.
  git-gui: Restore ability to Stage Working Copy for conflicts.
  git-gui: Fix Blame Parent & Context for working copy lines.