By Ellen Wulfhorst NEW YORK (Reuters) – It's all there in black and white. Stylish clothes being unveiled for spring 2014 are highlighting the pronounced simplicity of black and white. The colors are either elegant monochromes or mixed up in playful zebra prints, classic checks and mod color blocking. Victoria Beckham's show on Sunday was the latest in a string of collections at New York Fashion Week adhering almost entirely to a black and white palette. Her looks were sporty, with short pleated skirts, the season's omnipresent cropped tops and flouncy hemlines over knee-length shorts. …