EZ diffusion estimates added

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rtanalyze@49 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
updated simulatesamples function

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rtanalyze@50 edb9625f-4e0d-4859-8d74-9fd3b1da38cb