Merge version 0.17.3 on r-forge local

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/nmf@182 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Push version 0.17.5: fixes in windows installation due to vignettes

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/nmf@183 edb9625f-4e0d-4859-8d74-9fd3b1da38cb