Update python/requirements.txt to have ipython>=3.0.0
Update python/requirements.txt to have ipython>=3.0.0

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