Remove forgotten debug statement
minor tweaks to autoaway, one new debug message
Update update-server tools

Forgot to update them. But it turns out they are already multiplatform.
Fix #735
simple_make: Install lupdate/lrelease with APT
Prepare Core for av groupchats
Add GUI for audio groupchats
Merge branch 'av_groupchats'
Fix typo
Remember compile time timestamp

Will be used to guarantee we don't downgrade if there's a bad update
Auto-updater: Check timestamps before updating

Update the version file format to 2, breaks backward compatibility.
Windows: Uninstall start menu entries
Don't 'style' QGroupbot borders in settings
Add simple push to talk with P

Fixes #734
Listen for push-to-talk shortcut on more widgets
Silence IPC:processEvents failed to lock
Fix possible crash on ~IPC
Better debug output for groupchat not found
Fix vol must be muted to actually hear things
Use a source per call peer