Added support for node-gossip to be run from within a project's

directory.  This means that one can use git submodule to install it.
I was unable to get the tests working because a require path problem.
This problem was so bad I can only assume my environment is incorrect
for running expresso tests.  Please run tests and make sure they work.

index.js

@@ -0,0 +1,3 @@
+// This file is just added for convenience so this repository can be
+// directly checked out (submodule)  into a project
+module.exports = require('./lib/gossiper');

lib/gossiper.js

@@ -1,5 +1,5 @@
-var PeerState = require('peer_state').PeerState,
-    Scuttle = require('scuttle').Scuttle,
+var PeerState = require('./peer_state').PeerState,
+    Scuttle = require('./scuttle').Scuttle,
     EventEmitter = require('events').EventEmitter,
     net          = require('net'), 
     sys          = require('sys'),