add StyleTextPropAtom.cs
add StyleTextPropAtom.cs

git-svn-id: c2c5d07e262ed50e40b747c12a6c75ebdd83f29b@84 3d0cb27c-5942-9f1f-b0c8-b51bd5f61ba7

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