simplistic package/build tool

[Martin Nowak]

Because the discussion is rising up, I just added some help/information to  
a small tool I wrote some month ago.
It's raison d'être was the ability to develop a larger project out of  
smaller libraries.

It can:
  - compactly specify build targets
  - install packages with imports/documentation
  - link dependencies

It can't:
  - build import graphs and do partial rebuilds (waste of time with D)
  - compile other languages
  - do net installs

It can't yet:
  - version config settings by platform
  - do pre/post-build invokations
  - work with any other compiler but dmd2

It case you might find this useful:
https://github.com/dawgfoto/dpk