Update README.md
Made description more explicit as in
So somebody who got compilation error and opening creates.io description can see simple solition for most widely used systems,
e.q. it's called libopencv-dev on ubuntu, not opencv-dev
MODIFY
README.md
README.md
@@ -27,6 +27,17 @@ use opencv::prelude::*;
### Linux
+#### Arch Linux:
+
+OpenCV package in Arch is suitable for this.
+
+`pacman -S clang qt5-base opencv`
+
+#### Ubuntu:
+
+`sudo apt install libopencv-dev clang libclang-dev`
+
+#### Other Linux:
You have several options of getting the OpenCV library:
* install it from the repository, make sure to install `-dev` packages because they contain headers necessary

Update README.md

Made description more explicit as in https://github.com/paritytech/metadata-portal
So somebody who got compilation error and opening creates.io description can see simple solition for most widely used systems,
e.q. it's called libopencv-dev on ubuntu, not opencv-dev