Restored async.js module

Got lost in a spate of Git confusion on my part

node_modules/async/Makefile

@@ -0,0 +1,21 @@
+PACKAGE = asyncjs
+NODEJS = $(if $(shell test -f /usr/bin/nodejs && echo "true"),nodejs,node)
+
+BUILDDIR = dist
+
+all: build
+
+build: $(wildcard  lib/*.js)
+	mkdir -p $(BUILDDIR)
+	uglifyjs lib/async.js > $(BUILDDIR)/async.min.js
+
+test:
+	nodeunit test
+
+clean:
+	rm -rf $(BUILDDIR)
+
+lint:
+	nodelint --config nodelint.cfg lib/async.js
+
+.PHONY: test build all