Added links to REF.md references.
Added links to REF.md references.

dylansun/DeepLearnToolbox,DeercoderResearch/DeepLearnToolbox,Klangth/DeepLearnToolbox,hejunbok/DeepLearnToolbox,DeercoderResearch/DeepLearnToolbox,yjj19920505/mycode,ominux/DeepLearnToolbox,rasmusbergpalm/DeepLearnToolbox,zym1010/DeepLearnToolboxPlus,PaulWeiHan/DeepLearnToolbox,ominux/DeepLearnToolbox,tambetm/DeepLearnToolbox,chituma110/DeepLearnToolbox,UMD-ISL/DeepLearnToolbox,cainiaocome/DeepLearnToolbox,yike1207/DeepLearnToolbox,ubjxu7/machine-learning-test,AllenYick/DeepLearnToolbox,PaulWeiHan/DeepLearnToolbox,rasmusbergpalm/DeepLearnToolbox,hejunbok/DeepLearnToolbox,yonghenglh6/DeepLearnToolbox,sg-s/DeepLearnToolbox,vivanac/DeepLearnToolbox,DLlearn/deeplearning-,tambetm/DeepLearnToolbox,EugenePig/DeepLearnToolbox,myme5261314/DeepLearnToolbox,ilovecv/DeepLearnToolbox,Klangth/DeepLearnToolbox,sg-s/DeepLearnToolbox,liuluohua/DeepLearnToolbox,shushanbj/DeepLearnToolbox,tigerneil/DeepLearnToolbox,AllenYick/DeepLearnToolbox,chituma110/DeepLearnToolbox,jorik041/DeepLearnToolbox,tmhm/DeepLearnToolbox,ZenDevelopmentSystems/DeepLearnToolbox,yinyumeng/DeepLearnToolbox,shushanbj/DeepLearnToolbox,liuluohua/DeepLearnToolbox,zym1010/DeepLearnToolboxPlus,agilchr/DLT,EugenePig/DeepLearnToolbox,yinyumeng/DeepLearnToolbox,yuanzhigang10/dl-course-proj,yuanzhigang10/dl-course-proj,tigerneil/DeepLearnToolbox,yjj19920505/mycode,ilovecv/DeepLearnToolbox,jxqlovejava/DeepLearnToolbox,agilchr/DLT,dylansun/DeepLearnToolbox,tmhm/DeepLearnToolbox,yonghenglh6/DeepLearnToolbox,vivanac/DeepLearnToolbox,jorik041/DeepLearnToolbox,myme5261314/DeepLearnToolbox,ubjxu7/machine-learning-test,jxqlovejava/DeepLearnToolbox,ZenDevelopmentSystems/DeepLearnToolbox,yike1207/DeepLearnToolbox,UMD-ISL/DeepLearnToolbox,cainiaocome/DeepLearnToolbox,DLlearn/deeplearning-