Move build scripts

This pull request moves the Jam build scripts out lib and into a new ``share/opendylan/`` directory structure that we'll be using starting with 2014.1.

This is part of not polluting ``lib`` any more than we need to as well as just providing a better structure.

I made what I believe to be the right changes for Windows, but did not test there as I don't have a working build environment for Windows.