Add "wrap" command to TemplateProcessor. Use
github.com/mitchellh/go-wordwrap to wrap lines on word breaks at
a given length. This can make long fields much more readable in
a terminal. E.g.
{{ .fields.description | wrap 76 | indent 2}}
And remove vendor/, as it's now unnecessary. go.sum ensures that
dependencies aren't tampered with, and proxy.golang.org keeps copies of
all the archives.