remove make in pycifrw building and add change options for change director of src fetching
add 03-package.zsh
create directory before copy file
Add list of system packages required for source build.
Extract tar bundles after downloading.

Also skip tar file download if already present.
Back to building PyCifRW from mercurial source repository.

The repository builds if noweb is installed.
Rename pth file to make it include the release version.
Use new hard-linked tree instead of moving the files.
Do not install cctbx scripts.