added makefile for easy install

makefile

@@ -0,0 +1,20 @@
+VERSION = 0.3
+PREFIX = /usr/local
+MANPREFIX = ${PREFIX}/share/man
+
+rivet: rivet.sh
+
+install: rivet
+	mkdir -p ${DESTDIR}${PREFIX}/bin
+	cp -f rivet ${DESTDIR}${PREFIX}/bin/rivet
+	chmod 755 ${DESTDIR}${PREFIX}/bin/rivet
+	mkdir -p ${DESTDIR}${MANPREFIX}/man1
+	sed "s/VERSION/${VERSION}/g" < rivet.1 > ${DESTDIR}${MANPREFIX}/man1/rivet.1
+	chmod 644 ${DESTDIR}${MANPREFIX}/man1/rivet.1
+
+uninstall:
+	rm -f ${DESTDIR}${PREFIX}/bin/rivet\
+		${DESTDIR}${MANPREFIX}/man1/rivet.1
+
+clean:
+	rm -f rivet