Version 0.0.9

This is a pre-release before Quaternion 0.1, based on the just released libqmatrixclient v0.2.1. Since this is not supposed to be a full-fledged release, there are no detailed release notes (please look at the list of closed issues for details). Among most prominent news in the release (and this will be reiterated in 0.1 release notes):

• Redactions
• Files downloading (no uploading yet)
• Room creation and editing room settings (the settings are limited for now)
• Support of editing room tags (see in Room settings) and direct chats (right-click on the user in the userlist); grouping rooms by tag will come in Quaternion 0.1
• Support of authenticating proxy servers
• Proper messages to the user about SSL errors including self-signed certificates (and ability to confirm or reject them on individual basis)
• The scrollbar now visualises the current position among already cached events
• Massive treatment of issues with timeline: fonts aligned, lost images no more lost, stick-to-bottom logic works better, smoother and less CPU-hungry scrolling etc.
• Scroll state is remembered on a per-room basis (not across restarts yet)
• No more splash screen, since Quaternion starts up faster now
• As usual, plenty of work on stability, performance and memory footprint
  Thanks to all who helped! Quaternion 0.1 comes soon!