Adapt the makefile to presumed git workflow

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/kinfit/pkg/mkin@151 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Remove vignette PDFs to have them rebuilt on every build



git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/kinfit/pkg/mkin@152 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Test a git commit while svn not up to date

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/kinfit/pkg/mkin@153 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Fix quotes in makefile

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/kinfit/pkg/mkin@154 edb9625f-4e0d-4859-8d74-9fd3b1da38cb