Added params and some doctests

This allows you to pass `page` and `pagesize` as parameters.

For example you can now do the following:

```python
var acm = acmlib();
acm.get_person(1, {'page': 1, 'pagesize', 10});
```

doctest can now be run like the following

```sh
npm install -g doctest
doctest acmlib.js
```