override file resolution for browserify

use dist/rx.all.js instead of index.js
in browserfied code to get rid of Rx.Node

Author: ShihChi Huang

package.json

@@ -22,6 +22,9 @@
   "jam": {
     "main": "dist/rx.all.js"
   },
+  "browser": {
+    "index.js": "dist/rx.all.js"
+  },
   "dependencies": {},
   "devDependencies": {
     "benchmark": "*",