Format links using AsciiDoc in .adoc file
Format links using AsciiDoc in .adoc file

Some links in the README.adoc file were formatted using Markdown
link syntax, [title](url), rather than AsciiDoc syntax, url[title].

pivotalsoftware/pivotal-cla,pivotalsoftware/pivotal-cla,pivotalsoftware/pivotal-cla,pivotalsoftware/pivotal-cla