github token and namespace support in PR bot

[resmo]

I implemented github private token support, useful if you enabled 2fa
(you should...). You can then just pass --ghtoken to the cli.
Find more about gh token here
https://help.github.com/articles/creating-an-access-token-for-command-line-use/

Further I implemented support for "namespaces":

e.g. cloud/cloudstack/: resmo

This means I would also be added as maintainer for any PR in this namespace.

[gregdek]

THANK GOD

[gregdek]

That'll teach me to merge before testing. :)

The issue appears to be that the new handle_url code doesn't appear to be returning properly. So r.links, which expects to be this:

{'last': {'url': 'https://api.github.com/repositories/24474138/pulls?state=open&page=10', 'rel': 'last'}, 'next': {'url': 'https://api.github.com/repositories/24474138/pulls?state=open&page=2', 'rel': 'next'}}

...is instead just {}.

It may also be that the new code doesn't handle user/pass, which is still what we're using.