1020975 - do not create node cert repos with a url
1021119 - make sure private keys are never world readable

This should prevent similar mistakes in future.
Merge pull request #8 from iNecas/bz/1021119

1021119 - make sure private keys are never world readable
Merge pull request #7 from jlsherrill/1020975

1020975 - do not create node cert repos with a url
Merge pull request #9 from skottler/pulp_doc

Document the parameters of the pulp class
Automatic commit of package [node-installer] release [0.0.18-1].