Continue working in man pages, introducing a first shared section using [include] and [vset]
Refactor the include file slightly, so that Object/Class-specific parameters etc. of a shared method documentation can be provided in the respective Object.man/Class.man files
Some more refactoring
small introspection reform:
- Introspection for commands and arguments did not work for
  cmds defined in subpackages (such as mongodb). We keep
  now this information in hashtables and maintain a slim
  interface for this.
- fix generation of pkgIndex.tcl for mongodb
Merge branch 'master' of ssh://alice.wu-wien.ac.at/usr/local/src/git-repo/nsf