Note/warnings about production use edited per comments from @ERH.
Merge pull request #549 from epc/DOCS-978-mongodb-232

Note/warnings about production use edited per comments from @ERH.
rewrite per @kay.kim
fix javascript, correct phrase quoting and quote escaping
Merge pull request #551 from epc/DOCS-978-mongodb-232

DOCS-978 typo correction and correction about quoting