Performs left-to-right function composition. The leftmost function may have
any arity; the remaining functions must be unary.

In some libraries this function is named `sequence`.

**Note:** The result of pipe is not automatically curried.

@func
@memberOf R
@since v0.1.0
@category Function
@sig (((a, b, ..., n) -> o), (o -> p), ..., (x -> y), (y -> z)) -> ((a, b, ..., n) -> z)
@param {...Function} functions
@return {Function}
@see R.compose
@example

var f = R.pipe(Math.pow, R.negate, R.inc);

f(3, 4); // -(3^4) + 1
@symb R.pipe(f, g, h)(a, b) = h(g(f(a, b)))
function pipe() {
	  if (arguments.length === 0) {
	    throw new Error('pipe requires at least one argument');
	  }
	  return _arity(arguments[0].length, reduce(_pipe, arguments[0], tail(arguments)));
	}