added forum/issues in the readme file
added forum/issues in the readme file

qixiaobo/glu,zedfauji/glu-custom,zedfauji/glu-custom,pongasoft/glu,qixiaobo/glu,zedfauji/glu-custom,qixiaobo/glu,pongasoft/glu,qixiaobo/glu,pongasoft/glu,qixiaobo/glu,zedfauji/glu-custom,pongasoft/glu,pongasoft/glu