- update getEarnings to work with new webpage format
 - add getHoldings.iShares.ca() to get holdings of Canadian iShares 
   (not yet hooked up to getHoldings)


git-svn-id: svn://scm.r-forge.r-project.org/svnroot/twsinstrument/pkg/qmao@411 edb9625f-4e0d-4859-8d74-9fd3b1da38cb