v0.8.5-rc.1

Full Changelog

• Implement wrapper API for removing a room from a group
  #553
• Fix typo which resulted in stuck key download requests
  #552
• Store group when it's created
  #549
• Luke/groups remove rooms users from summary
  #548
• Clean on prepublish
  #546
• Implement wrapper APIs for adding rooms to group summary
  #545