Fixing members list (showing pending members, removing deleted members, show proper error message if user already invited) and functionality for limited blogger (no error messages due to no mail service on document submission, allows limited to delete his own drafts and pending docs, remove inaccessible comments and entries tabs), some better named functions in UserManager & WeblogPermission.orm.xml.

git-svn-id: https://svn.apache.org/repos/asf/roller/trunk@1517951 13f79535-47bb-0310-9956-ffa450edef68