update release notes for NPOI 2.0 alpha
update release notes for NPOI 2.0 alpha

git-svn-id: c2c5d07e262ed50e40b747c12a6c75ebdd83f29b@523 3d0cb27c-5942-9f1f-b0c8-b51bd5f61ba7

jcridev/npoi,Yijtx/npoi,tonyqus/npoi,JesseQin/npoi,stuartwmurray/npoi,vinod1988/npoi,tkalubi/npoi-1,akrisiun/npoi,antony-liu/npoi,xl1/npoi