Add note about testing to the README
Add note about testing to the README

EDUlib/xserver,edx/xserver,EDUlib/xserver,edx/xserver,Marx86/xserver,EDUlib/xserver,Marx86/xserver,edx/xserver,Marx86/xserver,edx/xserver,EDUlib/xserver,edx/xserver,EDUlib/xserver,Marx86/xserver,Marx86/xserver