defringe: first version for usermanual
defringe: change phrasing for usermanual a bit
defringe: add more informaion and change some parts of the usermanual
defringe usermanual: remove strength because it will also be removed in the iop because of too little effect and being mostly reproduceable with blending
Merge pull request #705 from bluesceada/defringe-usermanual

Defringe usermanual