Added support for Datatables

Added support for ajax-based server side validation (useful for validation of emails, duplicate usernames, etc.)
User form more or less ready in the basic version (i.e. without permission management)

client/src/users/List.js

@@ -0,0 +1,38 @@
+'use strict';
+
+import React, { Component } from 'react';
+import { translate } from 'react-i18next';
+import { Title, Toolbar, NavButton } from '../lib/page';
+import { Table, TableSelectMode } from '../lib/table';
+
+@translate()
+export default class List extends Component {
+    render() {
+        const t = this.props.t;
+
+        const actionLinks = [
+            {
+                label: 'Edit',
+                link: data => '/users/edit/' + data[0]
+            }
+        ];
+
+        const columns = [
+            { data: 0, title: "#" },
+            { data: 1, title: "Username" },
+            { data: 2, title: "Full Name" }
+        ];
+
+        return (
+            <div>
+                <Toolbar>
+                    <NavButton linkTo="/users/create" className="btn-primary" icon="plus" label={t('Create User')}/>
+                </Toolbar>
+
+                <Title>{t('Users')}</Title>
+
+                <Table withHeader dataUrl="/users/rest/usersTable" columns={columns} actionLinks={actionLinks} />
+            </div>
+        );
+    }
+}