Textual alterations

todo: Add examples for all forms. Especially difficult ones

Textual alterations

 * Addition,
 * deletion,
 * transposition,
 * clarification,
 * substition (should allow for cases like stylisitic rewriting and total rewriting, looser way),
 * restoration,
 * overwriting,
 * immediate/instant correction,
 * functional mark (marked as used, printer marks, later scribe marks),
 * gap for a planned insertion (which has been filled or not)

Here are Hilde Bøe's slides with examples from Henrik Ibsen's manuscripts: http://www.emunch.no/tei-mm-2008/index_ms.html