add browser file so we can have a custom browser environment

Makefile

@@ -35,7 +35,7 @@ build:
 
 	node bin/cache-templates
 
-	browserify lib/6to5/transform.js -s to5 >dist/6to5.js
+	browserify lib/6to5/browser.js -s to5 >dist/6to5.js
 	uglifyjs dist/6to5.js >dist/6to5.min.js
 
 	rm -rf templates.json
@@ -48,6 +48,9 @@ publish:
 	node bin/cache-templates
 	test -f templates.json
 
+	make build
+	cp dist/6to5.js browser.js
+
 	read -p "Version: "  version; \
   npm version $$version --message "v%s"
 	npm publish

lib/6to5/browser.js

@@ -0,0 +1,3 @@
+var transform = require("./transform");
+
+module.exports = transform;