rename icon, edit settings_header

rename launcher icon, make edit in settings to match

 Changes to be committed:
	renamed:    res/drawable-mdpi/ic_settings_cmlauncher.png -> res/drawable-mdpi/ic_settings_raumlauncher.png
	renamed:    res/drawable-xhdpi/ic_settings_cmlauncher.png -> res/drawable-xhdpi/ic_settings_raumlauncher.png
	modified:   res/xml/settings_headers.xml