All property/options names rename to coding style.

palette format make class/interface
pixel types - make class/interface
make usage only for one type of input/output image
add converters for all other types
remove all self/_this and rewrite with typescript style
move dithering out of main quant class

think to make chaining (new Buffer().fromImage(img).toImage())
think to make PointContainer fromXX methods static to be like Point.createFromXX methods or vice-versa
rename Point.createFromXX methods to fromXX methods
