client: refactor linking and routing

Print all links through new uri.js component
Refactor the router to use more predictable parsing
Fix linking to entities with weird names (that contain slashes, + etc.)

client/js/controllers/settings_controller.js

@@ -22,7 +22,7 @@ class SettingsController {
 };
 
 module.exports = router => {
-    router.enter('/settings', (ctx, next) => {
+    router.enter(['settings'], (ctx, next) => {
         ctx.controller = new SettingsController();
     });
 };