Added header_default.tex (One per page flashcards);

Added header_a4paper.tex (2x3 per page flashcards); Added new args for script : - --force [--f], ignore missing metadata - --a4paper [--a], output using header_a4paper.tex. Defaults to one flashcard per page. - --logs [--l], outputs metadata errors to ./output/logs.txt - --verbose [--v], outputs details about missing metadata per file In case sp:themeLicence appears multiple times in a .quiz file, we transcript every subject and theme separated by '/' Script outputs an error count and number of questions parsed. TODO : - Fetch question content and answer - Images, mathtex, etc. - Think of a way to scale image appropriately. - Links to be put aside for now, might be put in use with qrcode