Add Wikipedia Query Generator Module

Generate queries pulled from the current days wikipedia page
(ie. http://en.wikipedia.com/wiki/August_14)
Make Wikipedia Query Generator the default query generator
```page``` can not be None. At most it can be empty. If you follow the call chain ```helpers.getResponseBody -> request.read -> read``` you'll end up [here](https://docs.python.org/2/library/stdtypes.html#file.read). And that call can not return None.