New citation commands and theorem environments - Make it possible to \pubcite included publications, such that the reference label is of the form [PN] (English) or [JN] in Finnish, where N is the Arabic numeral of the attached publication. - Add a command \publicationRef for creating links to the title pages of attached publications. - Link to the list of publications from the attached publication title pages. - Get rid of amsthm because it is not compatible with PDF tagging, and define own custom "theorem boxes" definition, theorem, lemma, corollary and example, and their Finnish equivalents määritelmä, lause, apulause, seurauslause ja esimerkki. - Also add the proof environments todistus and proof. - Change default PDF standard to A-3b, which allows attachments to be embedded into a PDF file.