added some useful views and changed a few places to use these new views instead of querying directly from the content repository, there are more places to change still
fixes #1071when users are removed from a comm, the comm's folders are correctlyremoved from the dotlrn_fs portlet. there maybe more to this, butat least it's not totally broken like before
- Got rid of OpenNSD references- Fixed some broken links- Pointed Oracle and PostgreSQL Driver downloads to openacs.org/software.adp- Other wording corrections