improved numerical stability for AdaGrad
improved numerical stability for AdaGrad

CZCV/s-dilation-caffe,gogartom/caffe-textmaps,wangg12/caffe,wangg12/caffe,longjon/caffe,CZCV/s-dilation-caffe,wangg12/caffe,gogartom/caffe-textmaps,tackgeun/caffe,gnina/gnina,gnina/gnina,tackgeun/caffe,gnina/gnina,tackgeun/caffe,gogartom/caffe-textmaps,gnina/gnina,gnina/gnina,longjon/caffe,wangg12/caffe,CZCV/s-dilation-caffe,tackgeun/caffe,gnina/gnina,longjon/caffe,longjon/caffe,CZCV/s-dilation-caffe,gogartom/caffe-textmaps