ability to add extra fields to user data, new hook filter:user.addFields

src/user.js

@@ -217,9 +217,17 @@ var	async = require('async'),
 	};
 
 	User.getUsers = function(uids, callback) {
+		var fields = ['uid', 'username', 'userslug', 'picture', 'status', 'banned', 'postcount', 'reputation', 'email:confirmed'];
+		plugins.fireHook('filter:users.addFields', {fields: fields}, function(err, data) {
+			if (err) {
+				return callback(err);
+			}
+			data.fields = data.fields.filter(function(field, index, array) {
+				return array.indexOf(field) === index;
+			});
 			async.parallel({
 				userData: function(next) {
-				User.getMultipleUserFields(uids, ['uid', 'username', 'userslug', 'picture', 'status', 'banned', 'postcount', 'reputation', 'email:confirmed'], next);
+					User.getMultipleUserFields(uids, data.fields, next);
 				},
 				isAdmin: function(next) {
 					User.isAdministrator(uids, next);
@@ -244,6 +252,7 @@ var	async = require('async'),
 
 				callback(null, results.userData);
 			});
+		});
 	};
 
 	User.getStatus = function(status, isOnline) {