Adds README about future of rosnodejs.

README.md

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+Rosnodejs is currently deprecated.
+
+Most of my efforts for JavaScript and robotics has been shifted to the [Robot
+Web Tools project](http://robotwebtools.org). I highly recommend taking a look
+at Robot Web Tools if interested in putting your robot on the web. Features
+include:
+
+ * JavaScript interface to [ROS](http://ros.org) functionality
+ * 2D tools for mapping and more
+ * 3D tools for robot visualization in a 3D environment
+
+I still feel a Node.js interface into ROS is important. It would complement the
+goals of the [nodebots movement](http://nodebots.io/) while harnessing the
+awesome power and 1,000+ packages of the Robot Operating System.