Revising efficient frontier chart to not calculate metrics on assets unless specified in arguments

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/returnanalytics@3381 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Updating documentation for optimize.portfolio.rebalancing. Revision to optimize.portfolio to omit unnecessary calculation of ES when using ROI

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/returnanalytics@3382 edb9625f-4e0d-4859-8d74-9fd3b1da38cb