Change \transpose to \relative in ancient.itely (issue 7538043)

[aleksandr . andreev]

Reviewers: ,

Message:
Please review

Description:
Change \transpose to \relative in ancient.itely

Change \transpose c c' syntax to \relative c' syntax in examples in the
ancient notation chapter of notation manual.

Please review this at https://codereview.appspot.com/7538043/

Affected files:
  M Documentation/notation/ancient.itely