Load WebSocket module later.

This one change allows us to load the IE polyfills after the Ripple library.
Otherwise we would have to split up our dependencies into two groups, which
would add a bunch of complexity to the build system that I'd rather avoid.

src/js/remote.js

@@ -15,8 +15,6 @@
 //
 
 // npm
-var WebSocket     = require('ws');
-
 var EventEmitter  = require('events').EventEmitter;
 var Amount        = require('./amount.js').Amount;
 var Currency      = require('./amount.js').Currency;
@@ -427,6 +425,7 @@ Remote.prototype._connect_start = function () {
 
   if (this.trace) console.log("remote: connect: %s", url);
 
+  var WebSocket     = require('ws');
   var ws = this.ws = new WebSocket(url);
 
   ws.response = {};