2017-06-02 introduce global fields for document information and headers / footers
Currently, in b3484131 document title + subtitle + author are configured in main.tex, headers + footers are configured in the settings file. In addition, headers and footers for the first page have different settings from other pages.
Proposal: Create global fields for all information and re-use in the appropriate document places. Also provide a standard setting for headers / footers that holds for all pages in the document.
Edited by Christian De Schryver