XS templates : Update showcase template project to incorporate CCNodeGrid
XS templates : Update showcase template project to incorporate CCNodeGrid

MSylvia/CocosSharp,TukekeSoft/CocosSharp,TukekeSoft/CocosSharp,mono/CocosSharp,zmaruo/CocosSharp,zmaruo/CocosSharp,haithemaraissia/CocosSharp,MSylvia/CocosSharp,haithemaraissia/CocosSharp,mono/CocosSharp