Update `Stencil::read()`
Fixes issue with `MapContext::next()`
Change to `Xml::Node` selection API: `one` becomes `select`, `all` becomes `filter`. Allow for both CSS and XPath selector expressions.
Changes related to changes in `Xml::Node` API changes; fix to rendering of `for` elements related to nested loops.
Changes related to changes in `Xml::Node` API changes