doc.test

- library/lib/doc-tools.tcl: added [pinfo append] to collect multiple validation reports per entity - library/lib/doc-tools.tcl / owned_parts(): skip entities which are not structured themselves (namely parameters); otherwise they show up in the lefthand navigation or the autosearch box. also: glossary entries now disappeared from these navigation items (do we need them there?). - library/lib/doc-assets/command.html.tmpl: validation reports need to be fused using [join] - library/lib/doc-assets/command.html.tmpl: fixed subcommand support; adjusted and refined the per-command template, as well as @command validation. - Provided for parameter validation for @command and the extraction of the parametersyntax for commands - nsf.nxd: Added to the NSF documentation, namely completed a first round commands ::nsf::alias throughout ::nsf::log. Also: Refactored some glossary entries to nsf.nxd. - glossary: glossary entries can now be shared between projects; this required to make the back references aware of their project context. - @project: added a depends attribute which can be used to express inter-project dependencies. - An empty @doc string is now reported during validation - processor->process(): Added include/exclude filtering based on namespace patterns