[question] can I call initialize several times?

Consider the following example:

```python
from datadog import initialize, statsd
initialize(statsd_port=8001)
initialize(statsd_port=8002)
initialize(statsd_port=8003)

statsd.increment('home.page.hits')  # Is port 8003 being used here?
```

If I call `initialize` with different parameters, will the last call take effect?
