Change docs and example for RandomSort

Clarify that input is a single node; change example to comply (and to
not use value-of, which doesn’t make sense when a node-set is returned)
Merge pull request #6 from greystate/ucom.xml-docs-update

Change docs and example for RandomSort
Update compatibility.md

Added details for v7+
Update contribution.md

Swapped the source-control repo details over to GitHub.
Update contribution.md

Minor edits
Update contribution.md

Updated the bugs/discussions links
Update default.html

Updated the repo links from CodePlex to GitHub.
Update default.html

Updated the link on the "Fork me on GitHub" banner.
Update default.html

Updated the copyright year (dynamic, based on last published date)
Update default.html

oops - missed a quote
Update index.md

Updated the download link
Resolve conflict in RenderMacro docs
Obligatory ”greystate-pedantery" :-)