Force SSL API calls per #30

I generally don't like submitting PRs where I'm removing tests, instead of adding them. This case, however, the bulk of what I did was remove a method and the calls to it. The only remaining method that was changed is a private method, so I thought it best not to test that.

This should force calls to the fitbit API over SSL per their latest email saying they are going to start forcing SSL soon.

The only error I'm getting from rspec seems to be related to an rspec 3 syntax issue. I noticed someone else submitted a PR fixing that. :beers: