Copy all generated books to common path

Copy all generated books to directory publish-docs in the git top-level
so that Jenkins can publish them on docs-draft.

Also copies www directory over if files in it where changed.

The tool now uses a config-file "doc-test-conf" which is expected in the
top-level of the repository.

blueprint draft-docs-on-docs-draft

Change-Id: Iea67050d827407f2f71585372c673f7f1dbccc46