add sparkle framework and check for updates menu item.

embedded/download-sparkle.sh

@@ -0,0 +1,18 @@
+
+#!/bin/sh
+
+VERSION=1.26.0
+TAR=Sparkle-${VERSION}.tar.xz
+URL=https://github.com/sparkle-project/Sparkle/releases/download/${VERSION}/Sparkle-${VERSION}.tar.xz
+FRAMEWORK=Sparkle.framework
+
+if [ -e $FRAMEWORK ] ; then exit 0 ; fi
+
+if [ ! -e $TAR ] ; then curl -OL $URL ; fi
+
+mkdir -p Sparkle-${VERSION}
+cd Sparkle-${VERSION}
+if [ ! -e $FRAMEWORK ] ; then tar xfz ../$TAR ; fi
+cd ..
+
+ditto Sparkle-${VERSION}/$FRAMEWORK $FRAMEWORK