Fix the italics and fixed width text being nested wrong when rendered by Github.
Merge pull request #1129 from ReactiveCocoa/fix-markdown-misrendering

Fix the italics and fixed width text being nested wrong.
Better rendering fix.
Merge pull request #1133 from ReactiveCocoa/better-rendering-fix

Better rendering fix.
2014, yo
Merge pull request #1138 from chrissloey/patch-1

2014, yo
Consider a nil NSURLResponse to be an error
Merge pull request #1140 from ReactiveCocoa/better-async-response-check

Consider a nil NSURLResponse to be an error