Automate external libs download

Makefile

@@ -5,7 +5,28 @@ BUILDDIR = tmp
 
 include config.mk
 
-all: lint test build doc
+all: external lint test build doc
+
+#########################################
+# Download external lib
+#########################################
+# Download all external libs
+external: lib/sinon/sinon.js \
+     lib/jquery/jquery.js \
+     lib/qunit/qunit.js \
+     lib/qunit/qunit.css
+
+lib/sinon/sinon.js:
+	@mkdir -p $(@D)
+	curl -s -o $@ http://sinonjs.org/releases/sinon-1.7.3.js
+
+lib/jquery/jquery.js:
+	@mkdir -p $(@D)
+	curl -s -o $@ http://code.jquery.com/jquery-2.0.3.js
+
+lib/qunit/qunit.%:
+	@mkdir -p $(@D)
+	curl -s -o $@ http://code.jquery.com/qunit/qunit-1.12.0$(suffix $@)
 
 $(RENDERJS_MIN): $(RENDERJS)
 	$(UGLIFY_CMD) "$<" > "$@"
@@ -28,4 +49,4 @@ lint: ${BUILDDIR}/$(RENDERJS).lint
 doc:
 	$(YUIDOC_CMD) .
 clean:
-	rm -rf $(RENDERJS_MIN) ${BUILDDIR}
+	rm -rf $(RENDERJS_MIN) ${BUILDDIR} lib/sinon lib/jquery lib/qunit