Zipline dev here. Zipline happily works on minutely data (in fact, we recently dropped support for daily mode entirely on Quantopian, which is built on top of Zipline).
All the tutorials and examples for Zipline use daily data because there's no freely-available minutely data that we can distribute to our users.
I looked at it briefly over the weekend and then got distracted trying to make numpy.isfinite() work on datetimes :(. It's still in the queue though! Feel encouraged to gently bump it if I don't get back to you in the next day or two.
All the tutorials and examples for Zipline use daily data because there's no freely-available minutely data that we can distribute to our users.