function columnmajor( shape ) {
	var out;
	var s;
	var i;

	out = [];
	s = 1;
	for ( i = 0; i < shape.length; i++ ) {
		out.push( s );
		s *= shape[ i ];
	}
	return out;
}
Generates a stride array from an array shape (column-major).

@private
@param {NonNegativeIntegerArray} shape - array shape
@returns {Array} array strides