- notional was giving incorrect results when some instruments had no multiplier
 - remove redundant code
 - start using testthat; add regression test

git-svn-id: svn://scm.r-forge.r-project.org/svnroot/twsinstrument/pkg/qmao@406 edb9625f-4e0d-4859-8d74-9fd3b1da38cb