signald 0.9.0

see all code changes here

Big thanks to those who contributed to this release by filing issues and merge requests:

• @aguestuser
• @hoehermann
• @Strykar
• @bonfus
• @ekpneo

And thanks to demure on IRC for testing.

New Features

• Read receipts can now be sent. Thanks to @ekpneo, who contributed this in !10.
• Support for setting a users profile name and reading profile names of others has been added.
• Support for registration captchas has been added, although feedback on it has thus far been minimal. If you are unable to register without a captcha, please try to register with a captcha (instructions here) and respond to #8 letting us know how it went.
• Stickers can now be received.
• Support for receiving the full range of sync messages (sent from other devices on the account) available in this version of libsignal:
  • StickerPackOperations can now be received. These are commands from other linked devices on the same account to do things like add or remove sticker packs.
  • SentTranscriptMessages can now be received. This appears to be how Signal clients indicate to other devices that they have sent a message now.
  • View once views can now be received, indicating that the user has viewed view-once media on a different client.
  • Verification sync messages can now be received, indicating that the user has changed the verification status of another user's key.

Improvements

• A spelling mistake in the systemd unit file was fixed. Thanks to @Strykar, who contributed this change in !7.
• The username of the account receiving the message is now included in untrusted identity errors. Thanks to @aguestuser, who contributed this change in !8.
• Assorted code cleanup caused by use of an actual Java IDE, including updated copyright year on all Java files.
• If the socket file exists when signald is started, it will attempt to delete it so it can create it's own. This is a workaround to a common annoyance.
• Attempting to subscribe to nonexistent accounts will now throw an error (see #16). Thanks to @hoehermann for filing that issue.
• Fixed a bug (#20) where messages were received after the client unsubscribed.
• Fixed a bug in how sealed sender messages are decrypted. Thanks to demure on IRC for finding this bug and helping test fixes.
• Trying to get better about release notes. Feedback on this format appreciated.