0.10.0 release

Improvements in this release:

• Stage posts while waiting for request to return (makes it feel oh so snappy!)
• Performance improvements for /default and /read requests
• Don't display unread icon while menu is open
• Translations for Russian, Korean and Finnish
• Don't display 'everyone' group as an option for chat channels, which doesn't work with Babble anyway
• Add autocomplete for at-mentions
• Don't enforce topic length validations for chat channels
• Improve styling and performance of tooltips