Updates to RFinance 2014 presentation including the html slides

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/returnanalytics@3355 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
workaround for ROI with gmv_opt to respect lower bounds of 0

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/returnanalytics@3356 edb9625f-4e0d-4859-8d74-9fd3b1da38cb