Fixed typo in the main README
Transifex translation update

Mode: default
Minimum percent translated: 0
Matched 31 languages

Closes #1454
Overlay, OverlayClient: add PID and process name diagnostics to 'Dead client detected' notice.
Add Spotify to the overlay blacklist. It can cause Mumble to freeze/hang for multiple seconds.

Diagnosed using the updated dead client notice added
in fd782c3cb24235be2337b71f1e411240c4c112f1.
Merge remote-tracking branch 'upstream/master'