Added How to QA an Instant Answer to Resources section
Switch prev-next back to tabs
Fixed numbered list, removed bullets
Fixed bullet list indentation
more updates and improvement re: feedback
More improvements to relevanct, triggering and design sections
Added missing links to doc
Two small typo fixes
Merge branch 'zaahir/add-qa-docs' of https://github.com/duckduckgo/duckduckgo-documentation into jag/qa-docs-merge

Conflicts:
	duckduckhack/ddh-prev-next.json