urllib -> requests

[derek-adair]

There is a mish-mash of various request libraries used here. I plan on just swapping them all to requests

[xabrickx]

Hey, I'm new to this project and interested in picking this up.

I've "done" the change here
master...xabrickx:update/115_normalize_requests
but didn't want throw PR at you without saying any thing. My change creates simple wrappers for request/response and reroutes the current requests, including the lingering urllib requests, through them.

I'm happy to simplify this and ditch the wrapper if you prefer but thought the benefits of standardizing the requests would outweigh the additional complexity. Please let me know if I've missed anything or you have any recommendations?

[derek-adair]

My change creates simple wrappers for request/response and reroutes the current requests,

Most excellent, this needed doing anyways considering the user-agent string requirement. I'll be looking over this but at a glance it looks very solid.