updates to work with new shiny (pass session object to invalidateLater, and use renderPlot)

git-svn-id: svn://scm.r-forge.r-project.org/svnroot/twsinstrument/pkg/qmao@424 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
typo fix reanderPlot --> renderPlot

git-svn-id: svn://scm.r-forge.r-project.org/svnroot/twsinstrument/pkg/qmao@425 edb9625f-4e0d-4859-8d74-9fd3b1da38cb