Update __init__.py

[brysonpayne]

Update to use new Bing credential and recognition URLs - Microsoft is phasing out Bing Speech API, moving to Cognitive Services Speech API. The two URLs changed in this fork will work for demo Speech API keys after 11/1/2018.

[palikar]

Hi @brysonpayne ,

thanks for the PR! I took a look at the new API. It seems that there are several regional endpoints. In your code, the used endpoint is the West US one. I assume, however, that the speech_recognition library is used by a lot (hopefully) people across the world. Would you be able to modify the `recognize_bing? method a little bit by adding an keyword argument so that different regional endpoints can be used. The values of the argument can then be "west", "eastus", "eastasia",.. etc. I guess the default should be "westus". Please, also don't forget to update the documentation.

Let me now if you are willing to do that. If you don't have the time, I can make the changes myself and I will still merge you PR.