add pause key to lock screen
fix battery widget exception if no data could be fetched
fix skype tag layout
add function to show volume notification
make config sound backend agnostic (oss vs alsa)
fix random tags jumping bug
update tag rules
move kbd and systray widgets to last screen
printscreen key to make screenshot
make config sound backend agnostic (oss vs alsa)
move widgets configuration into separate file

See widgets/example-config.lua for example.
move notifications to last screen
add rules for chrome app list
add firefox and dwb rules
update tags and rules