/blog/manage/ should not be available. managing should only be done from /blog/admin/
Preferences must be set from /blog/admin/
comment moderation should only be allowed from admin(/blog/admin/)
managing entries(unpublish and delete) should only be available from admin
BlogEntry can only be edited from admin
fix a block name
pep8 changes
Fix test to check that only one Blog can be created. Fix save() of Blog to make sure that a single blog can be created