Convert Page to Entry Files

Before page files can be converted to entry files, we need to do some housekeeping.

We want to clean up the page files to optimize their conversion into entry files. All changes are made in the TEI file, leaving the docx file untouched.

Each file must have the same number of note anchors (@@) and note text (@@@), and we make sure every note is on a separate line. When the pages were scanned, the operator added comments in the page-inventory file about anomolies, like when a footnote runs over to the next page, and we address many of them in this preparation phase.