- update roxygen docs
- update exports to create roxygen-generated NAMESPACE file

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/returnanalytics@3310 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
- more roxygen NAMESPACE changes

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/returnanalytics@3311 edb9625f-4e0d-4859-8d74-9fd3b1da38cb