[IMP] router: replace t-routecomponent directive by RouteComponent

closes #287

src/router/RouteComponent.ts

@@ -0,0 +1,27 @@
+import { Component } from "../component/component";
+
+export const ROUTE_COMPONENT_TEMPLATE_NAME = "__owl__-router-component";
+export const ROUTE_COMPONENT_TEMPLATE = `
+    <t t-foreach="routes" t-as="route">
+        <t t-if="env.router.currentRouteName === route.name">
+            <t t-component="{{route.component}}" t-props="env.router.currentParams"/>
+        </t>
+    </t>`;
+
+export class RouteComponent extends Component<any, {}, {}> {
+  template = ROUTE_COMPONENT_TEMPLATE_NAME;
+  routes: any[] = [];
+  constructor(parent, props) {
+    super(parent, props);
+    const router = this.env.router;
+    for (let name of router.routeIds) {
+      const route = router.routes[name];
+      if (route.component) {
+        this.routes.push({
+          name: route.name,
+          component: "__component__" + route.name
+        });
+      }
+    }
+  }
+}