A small utility to create chainable methods.
Note: Functions passed into the .next() method should return a value.
Example
// Example functions
var add = function (a, b) { return a + b };
var multiply = function (a, b) { return a * b };
var subtract = function (a, b) { return a - b };
var divide = function (a, b) { return a / b };
var square = function (a) { return a * a };
// Usage
var value = Chainable(4)
.next(add, 5)
.next(subtract, 3)
.next(multiply, 10)
.next(divide, 2)
.next(square)
.value();
console.log(value); // 900