added upgrade notes
added upgrade notes

git-svn-id: 8673d99b29384655a56156975e4bfbffece5dd20@104 01ba9438-b82c-4373-9247-da971c9e6a59

jamesbassett/super-csv,ZioberMichal/super-csv,jamiebaggott/super-csv,super-csv/super-csv,liwei5365/super-csv,molinama/super-csv,jrw2/super-csv