Change `new Address` to `Address.new`

Documentation says `new Address(...)` but following the examples produces

      return new Address(addr);
             ^
    TypeError: object is not a function
        at /Users/johnbackus/bitcore-testing/validate-example-broken.js:9:10
        at Array.map (native)
        at Object.<anonymous> (/Users/johnbackus/bitcore-testing/validate-example-broken.js:8:3)
        at Module._compile (module.js:456:26)
        at Object.Module._extensions..js (module.js:474:10)
        at Module.load (module.js:356:32)
        at Function.Module._load (module.js:312:12)
        at Function.Module.runMain (module.js:497:10)
        at startup (node.js:119:16)
        at node.js:901:3

Changing `new Address` to `Address.new` fixes this.