adding support for  ancestor content

allows for retrieval of nodes up to content root, useful for breadcrumbs
and various other context scenarios
Merge pull request #23 from pc-pdx/master

 adding support for  ancestor content
Update README.md
Added NuGet package v2.0.2.
Merge branch 'master' of https://github.com/spopovic/uSiteBuilder
Merge branch 'master' into creuna-nuget