Adds hostname support, fixes #343

Works from previous testing but I haven't tried this personal revision
of the code. Take it with a grain of salt.

src/install.js

@@ -40,7 +40,17 @@ var async = require('async'),
 		}, {
 			name: 'redis:password',
 			description: 'Password of your Redis database'
-		}],
+		}, {
+            name: 'use_ip',
+            description: 'Do you want to bind to an IP or hostname?',
+            'default': 'n',
+            pattern: /y[es]*|n[o]?/,
+            message: 'Please enter \'yes\' or \'no\'',
+        }, {
+            name: 'hostname_ip',
+            decription: 'Hostname or IP to bind to'
+            'default': '0.0.0.0'
+        }],
 		setup: function (callback) {
 			async.series([
 				function (next) {

src/webserver.js

@@ -134,7 +134,7 @@ var express = require('express'),
 			templates['logout'] = parsedTemplate;
 		});
 
-		server.listen(nconf.get('PORT') || nconf.get('port'));
+		server.listen(nconf.get('PORT') || nconf.get('port'), nconf.get('use_ip') ? nconf.get('hostname_set') : '0.0.0.0');
 	}
 
 	auth.initialize(app);