make Connection test only run in node

...since it doesn't make sense for the browser

test/test.Connection.js

@@ -23,6 +23,8 @@ describe('Connection', function() {
     var c = new Connection(mSocket, mPeer);
     should.exist(c);
   });
+
+  if (typeof process !== 'undefined' && process.versions) { //node-only tests
     it('should create a proxied socket if instructed', function() {
       var mPeer;
       var c = new Connection(null, mPeer, {
@@ -30,6 +32,7 @@ describe('Connection', function() {
       });
       should.exist(c.socket);
     });
+  };
 });