update README to link to vignettes once they are made, and update the section about estimand. Add FAQ and answer questions: - how similar should I expect `fastEmu` results to be to `radEmu` results? - when do you recommend using `fastEmu` instead of `radEmu`?
update README to link to vignettes once they are made, and update the section about estimand.
Add FAQ and answer questions:
fastEmuresults to be toradEmuresults?fastEmuinstead ofradEmu?