xowiki-www-procs.tcl

- renamed array variables passed to xowiki-templates from
"property_doc" and "property_body" simply to "doc" and "body":
reasoning: this makes it more uniform to use this variables already
in the xowiki .adp files with the same name as in the master
templates.
- added @body.menubarHTML@ to allow the higher level master templates
to place the menubar. On the longer range, we might even prefer
@body.menubar@ to pass a generic (skin-agnostic) representation.
- replaced the hard wired placement of the menubar by a adp-controlled
layout
- added @body.title@ to provide a title suitable for <h1> in contrast
to @doc.title@ which is for <title>. Prefer usage of @body.title@
over @title@, but the latter variable is still provided.
- added csrf protection for wiki-search