Converted to node module

Converted to npm package
Added brower
Added browserify with minification
Updated Readme

index.js

@@ -0,0 +1,6 @@
+var web3 = require('./lib/main');
+web3.providers.WebSocketProvider = require('./lib/websocket');
+web3.providers.HttpRpcProvider = require('./lib/httprpc');
+web3.providers.QtProvider = require('./lib/qt');
+
+module.exports = web3;