Mixed up host and guest.
Add corrent version of nltk for ckanext-dgu, plus mock & factory-boy for ckanext-dgu-local tests.

Conflicts:
	README.md
	puppet/modules/dgu_ckan/manifests/init.pp
Revamp instructions for fresh machine, based on info from tbalaz.

Conflicts:
	puppet/modules/dgu_ckan/templates/ckan.ini.erb