Add support for Ubuntu MATE.

live-build/auto/config

@@ -149,6 +149,10 @@ if [ "$PREINSTALLED" = "true" ] && [ "$SUBPROJECT" != "wubi" ]; then
 			add_package live oem-config-gtk ubiquity-frontend-gtk
 			add_package live ubiquity-slideshow-xubuntu
 			;;
+                ubuntu-mate)
+			add_package live oem-config-gtk ubiquity-frontend-gtk
+			add_package live ubiquity-slideshow-ubuntu-mate
+                        ;;
 		ubuntu-server)
 			add_package live oem-config-debconf ubiquity-frontend-debconf
 			;;
@@ -306,6 +310,20 @@ case $PROJECT in
 		COMPONENTS='main restricted universe'
 		;;
 
+	ubuntu-mate)
+		add_task install minimal standard
+		add_package install ubuntu-mate-core ubuntu-mate-desktop
+		add_package live ubuntu-mate-live
+		LIVE_TASK='ubuntu-mate-live'
+		case $ARCH in
+			amd64)	add_package live linux-signed-generic ;;
+		esac
+		COMPONENTS='main restricted universe multiverse'
+		# The Ubuntu MATE STRUCTURE file has "feature
+		# no-follow-recommends".  Mirror this.
+		export APT_OPTIONS="--yes --no-install-recommends"
+		;;
+
 	ubuntustudio-dvd)
 		add_task install minimal standard ubuntustudio-desktop ubuntustudio-audio ubuntustudio-font-meta ubuntustudio-graphics ubuntustudio-video ubuntustudio-publishing ubuntustudio-photography
 		COMPONENTS='main restricted universe multiverse'