Simplifying the loader.

Plovr checks the referrer for query string parameters (like mode), so we don't need any of this query string parsing (thanks @elemoine for the tip).

The reason we still dynamically generate the script tag is to work on other domains (e.g. testing on a VM or mobile device).  In this case, we make use of the `window.location.hostname`.

demo/loader.js

@@ -1,36 +1,7 @@
 /**
-    Adds the plovr generated script to the document.  The following default 
-    values may be overridden with query string parameters:
-    
-     * hostname - localhost
-     * port - 9810
-     * mode - SIMPLE
-     * id - ol
+    Adds the plovr generated script to the document.
  */
 (function() {
-    var search = window.location.search.substring(1);
-    var params = {
-        hostname: "localhost",
-        port: "9810",
-        mode: "SIMPLE",
-        id: "ol"
-    };
-    var chunks = search.split("&");
-    var pair;
-    for (var i=chunks.length-1; i>=0; --i) {
-        pair = chunks[i].split("=");
-        params[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
-    }
-    
-    var host = params.hostname + ":" + params.port;
-    delete params.hostname;
-    delete params.port;
-    
-    var pairs = [];
-    for (var key in params) {
-        pairs.push(encodeURIComponent(key) + "=" + encodeURIComponent(params[key]));
-    }
-
-    var url = "http://" + host + "/compile?" + pairs.join("&");
+    var url = "http://" + window.location.hostname + ":9810/compile?id=ol";
     document.write("<script type='text/javascript' src='" + url + "'></script>");
 })();