Add TaskRouter support

[davejlong]

I'd like to see TaskRouter support added to to the library. I've started working on the integration on my fork at cagedata/ex_twilio

[davejlong]

The first hangup is that the TaskRouter API is at a different domain from the rest of the Twilio API. The Base URL for task router is https://taskrouter.twilio.com.

[danielberkompas]

@davejlong I'd definitely be open to including this. I hadn't seen that API from Twilio before. Let me know if you need any help!

[davejlong]

Looking at the API, I'm wondering if I should build a seperate package for TaskRouter given some of the differences between TaskRouter and other Twilio APIs. Also I feel like people using TaskRouter won't necessarily need to use other Twilio APIs and visa versa. What are your thoughts @danielberkompas?

[danielberkompas]

@davejlong When I first saw this issue, I thought that too. A separate package makes sense to me, since it isn't core to the main Twilio APIs.