Fix tag creation when making the release with SVN

git-svn-id: http://svn6.assembla.com/svn/pyfits/trunk@2582 ed100bfc-0583-0410-97f2-c26b58777a21
Update .authors file after SVN move off of Assembla

git-svn-id: http://svn6.assembla.com/svn/pyfits/trunk@2597 ed100bfc-0583-0410-97f2-c26b58777a21