Saturate QSV bitrate even for custom parameters

Fixes QSV not initializing with very high bitrates when custom
parameters are used
Don't display Connection.Disconnected for forced PostStopMessage
Update gitignore
Update to 0.637 (test build)
Allow for new test build auto-updating (0.636)

Woops, disabled auto-updating, and we should now have access to
auto-updating with test builds.  Also this is 0.636.
Merge remote-tracking branch 'upstream/master'