Add missing admin frontend files

frontend/src/admin/AdminRoutes.jsx

+import React, { Component, PropTypes } from "react";
+
+import { Route } from 'react-router';
+import { ReduxRouter } from 'redux-router';
+
+import SegmentApp from "./datamodel/containers/SegmentApp.jsx";
+
+export default class AdminRoutes extends Component {
+    render() {
+        console.log(this.props)
+        return (
+            <ReduxRouter>
+                <Route path="/admin">
+                    <Route path="datamodel">
+                        <Route path="segment/create" component={SegmentApp} />
+                        <Route path="segment/:id" component={SegmentApp} />
+                    </Route>
+                </Route>
+                <Route path="/*"/>
+            </ReduxRouter>
+        );
+    }
+}

frontend/src/admin/admin.module.js

+import AdminRoutes from "./AdminRoutes.jsx";
+
+import { createStore, combineReducers } from "metabase/lib/redux";
+
+import { routerStateReducer as router } from 'redux-router';
+import { reducer as form } from "redux-form";
+import * as datamodel from './datamodel/reducers';
+
+var Admin = angular.module('metabase.admin', []);
+
+Admin.config(['$routeProvider', function($routeProvider) {
+    const adminRoute = {
+        template: '<div mb-redux-component class="flex flex-column flex-full" />',
+        controller: ['$scope', '$location', '$route', '$routeParams',
+            function($scope, $location, $route, $routeParams) {
+                $scope.Component = AdminRoutes;
+                $scope.props = {};
+                $scope.store = createStore(combineReducers({
+                    // admin: {
+                    //     datamodel
+                    // },
+                    datamodel: combineReducers(datamodel),
+                    form,
+                    router
+                }), {});
+
+                // HACK: prevent reloading controllers as the URL changes
+                var route = $route.current;
+                $scope.$on('$locationChangeSuccess', function (event) {
+                    var newParams = $route.current.params;
+                    var oldParams = route.params;
+
+                    console.log("route", $route.current.$$route.controller, adminRoute.controller)
+                    if ($route.current.$$route.controller === adminRoute.controller) {
+                        $route.current = route;
+
+                        angular.forEach(oldParams, function(value, key) {
+                            delete $route.current.params[key];
+                            delete $routeParams[key];
+                        });
+                        angular.forEach(newParams, function(value, key) {
+                            $route.current.params[key] = value;
+                            $routeParams[key] = value;
+                        });
+                    }
+                });
+            }
+        ]
+    }
+
+    $routeProvider.when('/admin/datamodel/metric', adminRoute);
+    $routeProvider.when('/admin/datamodel/metric/:segmentId', adminRoute);
+
+    $routeProvider.when('/admin/datamodel/segment', adminRoute);
+    $routeProvider.when('/admin/datamodel/segment/:segmentId', adminRoute);
+
+    $routeProvider.when('/admin/datamodel/:objectType/:objectId/revisions', adminRoute);
+}]);