Replace options with keyword args

[kmcphillips]

Since we'll be dropping lower version support, we can use keyword args everywhere. #426

So many of the method signatures are like (a, b, c, d, e, options={}) and those should be replaced with documented keyword arguments.

[kmcphillips]

In any case where we still use option, in the case that we do, we need to symbolize_keys! because we are inconsistent about that now.