The PowerShares website has problems on their end.  Although they advertise holdings files, they do not actually ahve them.  getHoldings.powershares wraps the request in "try" so that multiple holdings can be downloaded even if some fail.


git-svn-id: svn://scm.r-forge.r-project.org/svnroot/twsinstrument/pkg/qmao@401 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
 getHoldings.ipath adds attributes for Description and Date to holdings object

git-svn-id: svn://scm.r-forge.r-project.org/svnroot/twsinstrument/pkg/qmao@402 edb9625f-4e0d-4859-8d74-9fd3b1da38cb