Fix typo
Fix usage of 'have' versus 'has'
Merge branch 'Aaron1011-patch-1'
Merge branch 'patch-2' of https://github.com/Aaron1011/toxcore
Added simple group auto test.
Added basic group message test.
Test now works with large groups.
Group stability fixes.
Fixed possible issue with wrong size being passed to opus_decode().
Delete close connection when peer leaves chat.
Restore compatibility with older group chats.