ERP spelling and license details added

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/erpr@54 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
replace DESCRIPTION

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/erpr@55 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
replace DESCRIPTION 2

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/erpr@56 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
replace DESCRIPTION 3

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/erpr@57 edb9625f-4e0d-4859-8d74-9fd3b1da38cb