refactorings and new functionality

added include replacements:

      <%= render(render.test,{a:10}) %>
      <%- _include("download/installation",{a:10}) %>

refactored page.ejs to be much simpler

* pulled out partial switches for _full and _tile renderings
* fixed several combinations of featured, related content
* temporarily removed looking into featured of related, b/c of missing pages for those (need discussion)
* aligned some partials (e.g. page and default, TODO more alignment needed, or fewer or better partials)
* simplified some other functionality, like nav - highlighting

Added error handling for non-connected run