Apply formatting and style

I'm totally just learning Go and using this PR to train myself. So, some of this may be incorrect but figured I'd offer it up.

1) Apply go fmt to README.md

It alphabetizes the import list.

2) 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

3) 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

4) Apply go fmt to collectlinks.go