give usage message for caffe cli
give usage message for caffe cli

- call format
- commands
- flags

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