Apply go fmt to README.md

It alphabetizes the import list.
Begin comments with package or method name

> The first sentence should be a one-sentence summary that starts with
> the name being declared. If the name always begins the comment, the
> output of godoc can usefully be run through grep.

http://golang.org/doc/effective_go.html#commentary
Apply code style to slice of strings

https://speakerdeck.com/nathany/learning-by-contributing?slide=8

> Arrays do not need to be initialized explicitly; the zero value of an
> array is a ready-to-use array whose elements are themselves zeroed

http://blog.golang.org/go-slices-usage-and-internals
Apply go fmt to collectlinks.go