sound:removed warnings
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
audio:removed Makefile
Merge branch 'develop'

audio:
    Now synchronize device status using event queue
audio:added service file
add xsettings
keybinding: modify add custom accel func
grub2: return simple entry titles which in level one
grub2: remove property Background in Grub2
grub2: hide interface Load()
grub2: refactoring code
xsettings: test new window
xsettings: update window
display: remove border property support
display: set mirrormode as defualt
display:  install dbusobject as early as possible
display: improve output plug/unplguin handle