use full word "display" for variable in all places

[ozzloy@gmail.com/oble] / initial_oble_setup_ubuntu.bash

#!/bin/bash

sudo aptitude install -y libcv2.1 libcvaux2.1 libcvaux-dev opencv-doc \
  python-opencv libx11-dev libxext-dev libxss-dev libhighgui-dev