Update README.md

mouseWheel scrolled vertically and horizontally. Separate !

Better check if CEF is called from the Godot editor

No longer use wget/python3_wget since may be problematic for some people

Do not manage MinGW (since not manage by CEF)

Update CEF version to 103

Update the example

Update README

Simplify gdcef_subprocess folder name to subprocess

Simplify subprocess

Cleanning

Add script to compile the example #20

Cleaning comments

Update README

Fix broken pictures not displayed