README: add standard reference links section
README: add standard reference links section

Signed-off-by: Gaetan Nadon <8a8cc541338200f67d4d0bcb65c78b6166649462@videotron.ca>

mmonaco/xf86-input-synaptics,kelnos/xf86-input-synaptics,sencer/synaptics,mortehu/xf86-input-synaptics,joeshaw/xf86-input-synaptics,gdestuynder/xf86-input-synaptics,gdestuynder/xf86-input-synaptics,RsrchBoy/xserver-xorg-input-synaptics,corcoran/xserver-xorg-input-synaptics,jiixyj/xf86-input-synaptics,joeshaw/xf86-input-synaptics,nanderson94/xf86-input-synaptics,quadpixels/three-finger-dragging,philipn/xserver-xorg-input-synaptics,quadpixels/three-finger-dragging,felipejfc/xserver-xorg-input-synaptics,eyko/xf86-input-synaptics,RsrchBoy/xserver-xorg-input-synaptics,ssaavedra/xf86-input-synaptics,philipn/xserver-xorg-input-synaptics,sencer/synaptics,Lyude/xf86-input-synaptics,felipejfc/xserver-xorg-input-synaptics,jiixyj/xf86-input-synaptics,felipejfc/xserver-xorg-input-synaptics,kelnos/xf86-input-synaptics,ssaavedra/xf86-input-synaptics,Lyude/xf86-input-synaptics,nanderson94/xf86-input-synaptics,eyko/xf86-input-synaptics,corcoran/xserver-xorg-input-synaptics,philipn/xserver-xorg-input-synaptics,mmonaco/xf86-input-synaptics,mortehu/xf86-input-synaptics