Add initial template for Annex IV of 2005 Special Report "Ozone Layer"

I added the source document annexIV, extracted from the whole
report in the parent folder, meta.txt which describes the source,
and data.csv which lists the fields and rows to fill.

Chairs and Reviewers are not expected to be included in data.csv,
only authors.
Rename folder 'annexIV' to 'annexIV-authors'

The change aims to clarify that the data extracted from the annex
is only Authors, not Chairs and Reviewers.