Use $(LIBO_SHARE_FOLDER) instead of hardcoded 'share'

Change-Id: I073d44c0e3e8c6eff0e885f827fa661e3c8e5206
Use the white on purple LOfC icon

Change-Id: I2c49e5018742f35c57ab1290b783e47ed0a3b73b
Put schema.xml in the correct place, and drop the empty English strings file

Change-Id: Ic9d3894611eedcffa9ce79ae8b2745de72eb9117