Missing period in README.md

"That's not safe" -> "That's not safe."
HackerNews, not HackNews.
Merge pull request #7 from TheFox/hackernews

HackerNews, not HackNews.
Merge pull request #6 from AEAMcNett/patch-1

Missing period in README.md
Merge
Merge branch 'lnhubbell-patch-1'
blackbox_edit created