MathUtils: ease() S-SHAPED CROSS-FADE CURVE
MathUtils: ease() S-SHAPED CROSS-FADE CURVE

arielm/new-chronotext-toolkit,SlateScience/new-chronotext-toolkit,arielm/new-chronotext-toolkit,neshume/new-chronotext-toolkit,michaelboccara/new-chronotext-toolkit,michaelboccara/new-chronotext-toolkit,SlateScience/new-chronotext-toolkit,michaelboccara/new-chronotext-toolkit,SlateScience/new-chronotext-toolkit,neshume/new-chronotext-toolkit,arielm/new-chronotext-toolkit,neshume/new-chronotext-toolkit