Adds a Makefile to produce distribution

Makefile

@@ -0,0 +1,39 @@
+VERSION=1.1
+NAME=shcheck
+
+CHECKS=$(wildcard checks/*.sh)
+DIST=$(NAME).sh
+DIST_EXAMPLE=$(NAME)_example.sh
+PKG=$(NAME)-$(VERSION)
+PKG_GZ=$(PKG).tar.gz
+PKG_BZ2=$(PKG).tar.bz2
+PKGS=$(PKG_GZ) $(PKG_BZ2)
+
+all: lint
+
+$(PKGS): $(DIST) $(DIST_EXAMPLE) README
+	tar --xform='s|^|./$(NAME)-$(VERSION)/|' -acvf "$@" $^
+
+$(DIST).bz2: $(DIST)
+	tar -acvf 
+
+$(DIST_EXAMPLE): example.sh
+	sed 's|^\. \./check.sh$$|. ./$(DIST)|' < $^ > $@; \
+		chmod +x $@; \
+		$(MAKE) lint_dist
+
+$(DIST): check.sh $(CHECKS)
+	grep -Ev '^\. \./checks/.*\.sh$$' > $@ < $<; \
+		cat $(CHECKS) | grep -v '^#' >> $@;
+
+lint_dist: $(DIST) $(DIST_EXAMPLE)
+	shellcheck $^
+
+lint: example.sh check.sh $(CHECKS)
+	shellcheck -x example.sh check.sh && \
+		[ -f "$(DIST)" ] && $(MAKE) lint_dist
+
+.PHONY: clean
+
+clean:
+	-rm -vf $(DIST) $(DIST_EXAMPLE) $(PKGS)