Readme: install instructions are not clear

[beef9999]

Install OpenCV, PyQt4, Anaconda.

That means I have to install these three separately?

conda install -c https://conda.anaconda.org/menpo opencv3

Install opencv with anaconda again?

[Norcy]

yes. this install instruction is not clear.

Installing sip watses me a lots of time~

[Hironsan]

Ok, I'll write it more clearly.