Introduction chapter updates

[abogdanoski]

• Add instructions on how to use the Guide together with the platform (e.g. read the guide first or read them side by side)
• Add a note that definitions of basic concepts can be found in the Glossary
• Add a note: the guide principally intended for reproductions of economics research, but may be used in other social science disciplines. Contribute with “translations” to another discipline
• Number sub-headings in this chapter
• In “Stages of the exercise”: add Stage 0
• Fix: “These guidelines do not include a possible fifth stage of extension. Here you may extend the current paper by including new methodologies or data. If you where to extend the same methodology and research question into a different sample, that would bring you closer to a replication.”
• Clarify the chronological sequence of the stages: they are not (?) based on a strict order except for Scoping (also explain why that is and note that user won’t be able to edit once they’ve completed that part of the form). @fhoces
• Remove “Recording the results of the exercise”
• Explain figure 0.3 about relevant unit of analysis at each stage (add in “beyond binary judgments) @fhoces

[fhoces]

Done reviewing this. Not sure about the unchecked tasks.