Log Message:
Update i3 to 4.0.1

Changelog:
 # Fix the build process of i3bar
 # Fix the build process on Mac OS X
 # i3-config-wizard: also start i3bar in the keycode config template
 # userguide: Remove the obsolete bar.* colors
 # userguide: Use i3bar instead of dzen2 in the 'exec' example