WL-2616 Stop reading lists being copied when making a site from a template

Currently the reading lists do not actually get copied, instead a reference
to the original reading list is used and so changes to one cause changes to
all. This disables the reading list from being copied at all.
Merge pull request #22 from ox-it/WL-2616

WL-2616 Stop reading lists being copied when making a site from a template