Core update
remember status when disconnected (should help with #715)
fix crash if no boostrap nodes (fix #791 where "fix" means "mask the underlying problem")
set aliases from chat form (half of #780)
fix bug (which is actually why aliasing was menu'd in the first place)
add group title menu option, other half of closes #780
also truncate all group titles to max len
Fix zlib link order on windows x64
Update windows installer for x64
Merge branch 'pr804'
Merge branch 'pr805'
Remove unnecessary OSX lib search paths
README: Add qTox windows 64 bit download link
Italian translation: update
check incoming data from DB
Move group audio playing to Audio singletong/thread

This is a bit of a quick fix for a new bug, as but part of cleaning up the audio code and moving it to the Audio singleton
Merge branch 'cleanaudio'
Merge branch 'pr814'
Merge branch 'pr815'
fix #811
Cherry pick c459263d27531b7856457b13e9b556b2aeb21dae