Remaining things to do before the 0.4 release:

- Fetch friends/members and probably wall posts collections when you receive a friend request or join a group, especially a non-public group
- Support including links in i18n strings because Crowdin is really not liking how I split strings into multiple keys ("before_something" and "after_something")
- Send Update{Question} periodically upon receiving a poll vote so Smithereen-to-Smithereen poll results stay in sync