Added Swarm to exports of index.js

Need this for overriding getSwarm()

Author: repomaa

index.js

@@ -1,6 +1,8 @@
 var Client = require('./client')
 var Server = require('./server')
+var Swarm = require('./lib/swarm')
 
 module.exports = Client
 module.exports.Client = Client
 module.exports.Server = Server
+module.exports.Swarm = Swarm