Unsupport py34; Support newer arrow and requests-oauthlib dependencies

[jlapenna]

This also required updating calls to fetch_token to include_client_id, as needed by the withings/nokia API.

[coveralls]

Coverage remained the same at 100.0% when pulling e80c3ab on jlapenna:master into cbae16f on orcasgit:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 6006ff8 on jlapenna:master into cbae16f on orcasgit:master.

[brad]

@jlapenna Looks like we should drop support for Python 3.4. Can you make the change?

[jlapenna]

I can definitely do that. I've never used worked with travis CI before so it might take me a minute or six to figure out how to stop testing/supporting py3.4

[jlapenna]

Alright (I'm also new to github), I pushed my changes to my fork, which according to the comments here should maybe trigger test re-runs.

[jlapenna]

Hm. This seems to still use the tox.ini in your branch, so I'm not sure how to trigger it with this pull request.

[brad]

@jlapenna That is right, it just needs to be removed from .travis.yml as well

[jlapenna]

Looks correct, now. yay. I also updated the title of the pull request.

[brad]

I have some inline comments (questions) about the changes

[jlapenna]

I haven't done a code review in a git pull request before, so I don't know if I resolved your comments correctly. Let me know.

[jlapenna]

I haven't done a code review in a git pull request before, so I don't know if I resolved your comments correctly. Let me know.

[jlapenna]

@brad I have made all the requested changes.

[brad]

LGTM

[brad]