ubuntu16.04安装opencv4.1.0+opencv_contrib4.1.0

主要参考了https://blog.csdn.net/u011897411/article/details/89743448

opencv4.1.0 下载地址：https://github.com/opencv/opencv/releases
拓展库下载地址：https://github.com/opencv/opencv_contrib/releases

对于ippicv_2019_lnx_intel64_general_20180723.tgz的下载问题，参考了https://blog.csdn.net/orDream/article/details/84311697