Create new Customer experience category (#46)

With two items, suggested by @tomdyson in #45.

README.md

@@ -19,6 +19,7 @@ Awesome Wagtail [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38
   - [E-commerce](#e-commerce)
   - [SEO and SMO](#seo-and-smo)
   - [Analytics](#analytics)
+  - [Customer experience](#customer-experience)
   - [Security](#security)
   - [Media](#media)
   - [Translations](#translations)
@@ -102,7 +103,11 @@ Awesome Wagtail [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38
 ### Analytics
 
 - [Wagtail Analytics](https://github.com/tomdyson/wagalytics) - A Google Analytics dashboard in your Wagtail admin.
+
+### Customer experience
+
 - [Wagtail Experiments](https://github.com/torchbox/wagtail-experiments) – A/B testing for Wagtail.
+- [Wagtail Personalisation](https://github.com/LabD/wagtail-personalisation) - Personalisation module, enabling editors to create customised pages - or parts of pages - based on segments whose rules are configured directly in the admin interface.
 
 ### Security
 
@@ -142,7 +147,6 @@ Awesome Wagtail [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38
 - [Wagtail Sharing](https://github.com/cfpb/wagtail-sharing) – Easier sharing of Wagtail drafts.
 - [Wagtail Postgres Search Backend](https://github.com/leukeleu/wagtail-pg-search-backend) - PostgreSQL full text search backend for Wagtail CMS.
 - [Wagtail Gridder](https://github.com/wharton/wagtailgridder) - Grid card layout similar to Google image search results, with an expanded area for card details.
-- [Wagtail Personalisation](https://github.com/LabD/wagtail-personalisation) - Personalisation module, enabling editors to create customised pages - or parts of pages - based on segments whose rules are configured directly in the admin interface.
 
 ## Tools