Makefile updated; can use node jslint and node uglify-js

Makefile

 OUT			= jio.js
 UGLY_OUT	= jio.min.js
-LINT_CMD	= jslint --terse
-UGLIFY_CMD	= uglifyjs
+# npm install jslint
+LINT_CMD	= $(shell which jslint || echo node ~/node_modules/jslint/bin/jslint.js) --terse
+# npm install uglify-js
+UGLIFY_CMD	= $(shell which uglifyjs || echo node ~/node_modules/uglify-js/bin/uglifyjs)
 FILE_DIR	= src/jio
 STORAGE_DIR = src/jio.storage
 
@@ -19,7 +21,7 @@ concat:
 
 # uglify jio.js to build jio.min.js
 uglify:
-	$(UGLIFY_CMD) -- "$(OUT)" > "$(UGLY_OUT)"
+	$(UGLIFY_CMD) "$(OUT)" > "$(UGLY_OUT)"
 
 # lint all files in FILES and STORAGE_FILES
 # command: jslint [options] file
@@ -28,7 +30,7 @@ uglify:
 # /*jslint indent: 2, maxlen: 80 */
 # /*global hex_sha256: true, jQuery: true */
 lint:
-	$(LINT_CMD) -- $(LINT_FILES:%=$(FILE_DIR)/%.js)
+	$(LINT_CMD) $(LINT_FILES:%=$(FILE_DIR)/%.js)
 
 .phony: clean
 clean: