Mention DFTIMEWOLF_NO_RAINBOW in user manual (#370)
Mention DFTIMEWOLF_NO_RAINBOW in user manual (#370)

I needed to look back at an months old chat with @tomchop to find out how to deactivate
Onager/dftimewolf,log2timeline/dftimewolf,log2timeline/dftimewolf,Onager/dftimewolf