- fixed example to pass check


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/returnanalytics@3338 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
- removed ':::' to internal functions and exported xts functions

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/returnanalytics@3339 edb9625f-4e0d-4859-8d74-9fd3b1da38cb