Updated vignette directory


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mirtest@42 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Added imports to NAMESPACE
removed library calls from miRtest.R


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mirtest@43 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Updated to version number 1.6


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mirtest@44 edb9625f-4e0d-4859-8d74-9fd3b1da38cb