Added install task to Makefile.

Makefile

@@ -1,4 +1,12 @@
-.PHONY: test
+.PHONY: install test
+
+DIRS=etc lib bin sbin share
+INSTALL_DIRS=`find $(DIRS) -type d 2>/dev/null`
+INSTALL_FILES=`find $(DIRS) -type f 2>/dev/null`
+
+install:
+	for dir in $(INSTALL_DIRS); do mkdir -p $(DESTDIR)$(PREFIX)/$$dir; done
+	for file in $(INSTALL_FILES); do cp $$file $(DESTDIR)$(PREFIX)/$$file; done
 
 test:
 	SHELL=`command -v bash` ./test/runner