Speech bubble stuff.

To use:

```
IconGenerator iconGenerator = new IconGenerator(this);
SpeechBubble b = new SpeechBubble("Marker 2", new LatLng(37.7700699, -122.407618), SpeechBubble.ColorType.BLUE);

MarkerOptions marker1 = b.generateMarker(iconGenerator);
map.addMarker(marker1);

```

Will yield:

![image](https://f.cloud.github.com/assets/326857/1460417/2f3aa72c-4435-11e3-992f-2524783e600d.png);