v0.6.9.2

Prelease for testing with Syncthing v0.11.
Don't touch unless you know what you are doing.

• Another batch of fixes for API changes in Syncthing v0.11
• Using new FolderSummary and FolderCompletion events instead of pooling data
• -> reduced CPU ussage

Requires daemon version 0.11.0-beta6 or newer