Merge remote-tracking branch 'origin/translation'

Merge remote-tracking branch 'origin/translation'

Conflicts:
	Documentation/changes.tely
	Documentation/included/authors.itexi
	Documentation/notation/input.itely
	Documentation/notation/repeats.itely
	Documentation/snippets/making-an-object-invisible-with-the-transparent-property.ly
	Documentation/snippets/unfretted-headword.ly
	Documentation/usage/running.itely
	Documentation/web/download.itexi
	Documentation/web/introduction.itexi
	VERSION