Update readme and fix style for basic auth support, changed auth_login to auth_user to match http_basic plugin and xhr spec

Author: mobz

README.textile

@@ -21,6 +21,15 @@ This will automatically download the latest version of elasticsearch-head from g
 * is available at "http://localhost:9200/_plugin/head/":http://localhost:9200/_plugin/head/ (or whatever the address of your cluster is)
 * Will not work with elasticsearch prior to version 0.17
 
+h5. URL Parameters
+
+Parameters may be appended to the url set some initial state eg. @head/index.html?base_uri=http://node-01.example.com:9200@
+
+* @base_uri@ force elasticsearch-head to connect to a particular node.
+* @auth_user@ adds basic auth credentials to http requests ( requires "elasticsearch-http-basic":https://github.com/karussell/elasticsearch-http-basic plugin)
+* @auth_password@ basic auth password as above (note: without "additional security layers":http://security.stackexchange.com/questions/988/is-basic-auth-secure-if-done-over-https, passwords are sent over the network *in the clear* )
+
+
 h4. Running as a standalone webapp
 
 * @git clone git://github.com/mobz/elasticsearch-head.git@

index.html

@@ -38,12 +38,12 @@
 				var args = location.search.substring(1).split("&").reduce(function(r, p) {
 					r[decodeURIComponent(p.split("=")[0])] = decodeURIComponent(p.split("=")[1]); return r;
 				}, {});
-				new es.ElasticSearchHead("body", 
-                                {   id: "es", 
-                                    base_uri: args["base_uri"] || base_uri,
-                                    login : args["auth_login"] || "",
-                                    password : args["auth_password"]
-                                });
+				new es.ElasticSearchHead("body", {
+					id: "es", 
+					base_uri: args["base_uri"] || base_uri,
+					auth_user : args["auth_user"] || "",
+					auth_password : args["auth_password"]
+				});
 			});
 		</script>
 		<link rel="icon" href="lib/es/images/favicon.png" type="image/png">

lib/es/widgets.js

@@ -1348,20 +1348,18 @@
 		init: function(parent) {
 			this._super();
 			this.base_uri = this.config.base_uri;
-			if (this.base_uri.charAt(this.base_uri.length-1) !== "/") {
+			if( this.base_uri.charAt( this.base_uri.length - 1 ) !== "/" ) {
 				// XHR request fails if the URL is not ending with a "/"
 				this.base_uri += "/";
 			}
-                        
-                        if(this.config.login && this.config.login.length > 0) {
-                            var userAndPw = this.config.login + ":" + this.config.password;
-                            var credentials = window.btoa(userAndPw);
-                            $.ajaxSetup({
-                                headers: {
-                                    'Authorization': "Basic " + credentials
-                                }
-                            });                               
-                        }
+			if( this.config.auth_user ) {
+				var credentials = window.btoa( this.config.auth_user + ":" + this.config.auth_password );
+				$.ajaxSetup({
+					headers: {
+						"Authorization": "Basic " + credentials
+					}
+				});
+			}
 			this.cluster = new es.Cluster({ base_uri: this.base_uri });
 			this._initElements(parent);
 			this.instances = {};