add timeout arg to unexported update.data()

git-svn-id: svn://scm.r-forge.r-project.org/svnroot/twsinstrument/pkg/twsInstrument@408 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
 - remove mention of BAM directory in docs; hasn't been in use for a long time.
 - commit unsaved changes to update.data
 - Suggests R.utils (for evalWithTimeout)

git-svn-id: svn://scm.r-forge.r-project.org/svnroot/twsinstrument/pkg/twsInstrument@409 edb9625f-4e0d-4859-8d74-9fd3b1da38cb