☂ Polls

[gnprice]

I.e., this Zulip feature:
https://zulip.com/help/create-a-poll

This is an umbrella issue. The different aspects of poll support are in several sub-issues:

• polls: Read-only support #165
• polls: Vote and unvote on options #166
• polls: Add an option to a poll #167
• polls: Edit the poll question #168
• polls: Help creating a poll #169

I expect we won't do these all at the same time. In particular #165 and #166 are features zulip-mobile has and should happen before launch, but the others are features it doesn't (and haven't been near the top of the list of features we regularly hear requests for, either) and can happen later.