add logout method
Remove 'Reader' from users of workspace

If we give everyone Reader, we lose the ability to use the local role of Reader when giving specific access to items.
Allow TeamMember to view a workspace (now that we've removed Reader)
Add some permissions tests
Make sure Reader can view content
Make sure Editor can modify content
Moderators can view all content in the workspace
Further permissions tests
Merge pull request #11 from ploneintranet/workflow-tests

Workflow tests