update .gitignore
update .gitignore

add .idea/*

junjiem/CBoard,junjiem/CBoard,bigdata-eqxiu/CBoard,yzhang921/CBoard,junjiem/CBoard,hjtoday/CBoard,xiaochen2012/CBoard,xiaochen2012/CBoard,xiaochen2012/CBoard,hjtoday/CBoard,yzhang921/CBoard,bigdata-eqxiu/CBoard,hjtoday/CBoard,junjiem/CBoard,xiaochen2012/CBoard,yzhang921/CBoard,bigdata-eqxiu/CBoard,hjtoday/CBoard,bigdata-eqxiu/CBoard,yzhang921/CBoard