The usage example doesn't compile

```
C:\Users\BruceAxtens\Resources\Prog\JS\other\analytica\ca.js:3
var googleOAuth = require('google-oauth')({
^
TypeError: object is not a function
at Object. (C:\Users\BruceAxtens\Resources\Prog\JS\other\analytica\ca.js:3:42)
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
```