Ensure the demo works in browsers that don't support SW

[jeffposnick]

It's a little hard to test outside of Chrome right now, because something Polymer-related (I think <template is="x-repeat"> isn't happy), but prior to launch, make sure that the demo works in browsers without SW support. This will likely mean bringing in the fetch and Promise polyfills.

[wibblymat]

Ha, I just came in to the issues to add this very same thing :)

[jeffposnick]

I've added a window.fetch() polyfill for the demo in #38 and Firefox is now happy.

The issue with Internet Explorer has to do with https://www.polymer-project.org/0.5/docs/polymer/databinding-compat.html#elements-that-cant-contain-a-template

Unfortunately, there's no Polymer 1.0 equivalent of the template attribute, so getting the demo working with IE is on hold until that's supported.

[notwaldorf]

@jeffposnick Is this still a problem? We're trying to triage open issues and don't really know the status of this. Please change the priority if you think it's wrong!

[jeffposnick]

It's still an issue with the demo as constructed and certain versions of IE, yup. A "backlog" label seems appropriate, as it doesn't involve any consequential breakage, and it's a reminder to me that the demo could be rewritten to avoid using a <select>.