brooklyn-55 issue

@richardcloudsoft could you please check this out and test it locally?

N.B.: the http://git.io/GzkOKQ link may be broken until we merge https://github.com/apache/incubator-brooklyn/pull/157
A reminder to *not* use a leading slash in links. Either use a relative link like `../whatever.html`, or full link like `{{site.url}}/whatever.html`. This also applies to the three other uses of leading slash links in this file.