Add latest Wagtail Wednesdays videos (#78)

So many nice videos! 👏

Full list:

- [Wagtail Wednesdays #01 - Adding Help Text to Improve Wagtail Editor Experience](https://www.youtube.com/watch?v=ciYNMcv3lE0) – Catherine talks you through the steps you can take to add some useful supplementary text fields to the Wagtail admin.
- [Wagtail Wednesdays #02 - Customising Rich Text Features in Wagtail](https://www.youtube.com/watch?v=ei7ot_Wry3o) – Catherine talks you through the steps you can take to customise your rich text editors to control which features are available to your content editors.
- [Wagtail Wednesdays #03 - Using tabs to create a cleaner admin interface](https://www.youtube.com/watch?v=uZc0aZrHtQw) – Chris talks you through using tabs to organise fields.
- [Wagtail Wednesdays #04 - Organising Images and Documents using Wagtail Collections](https://www.youtube.com/watch?v=HGXHtFpLDCA) – Kieran talks you through the process of organising your images and documents into collections.
- [Wagtail Wednesdays #05 - How to organise your fields and streamline the editor experience](https://www.youtube.com/watch?v=CedcZmQ9KHs) – Chelsea talks you through the process of organising your fields to make it easier to manage them and streamline the editor experience.
- [Wagtail Wednesdays #06 - Creating & using custom settings in your wagtail site](https://www.youtube.com/watch?v=KJWCGq3IRNc) - Chris talks you through setting up and using custom site settings.
- [Wagtail Wednesdays #07 - How to Enable the Wagtail Styleguide](https://www.youtube.com/watch?v=_CfU9UivYPI) – It’s a really helpful resource that takes no time at all to enable and it allows you to check your components against the guidelines and shows all the available Wagtail icons.

README.md

@@ -223,9 +223,14 @@ Awesome Wagtail [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38
 ### Videos
 
 - [Wagtail screencasts: Creating and displaying pages in Wagtail](https://www.youtube.com/watch?v=o_dFgr8HZYU) - This video will show you how to create and display pages using the Wagtail CMS.
-- [Draftail extensions – custom entities tutorial](https://www.youtube.com/watch?v=nCMgoTerEb4) – Step-by-step tutorial to make extensions for Draftail.
-- [Wagtail Wednesdays #01 - Adding Help Text to Improve Wagtail Editor Experience](https://www.youtube.com/watch?v=ciYNMcv3lE0) – In this weeks video Catherine talks you through the steps you can take to add some useful supplementary text fields to the Wagtail admin, helping you in your journey to creating great sites for yourself and your clients.
-- [Wagtail Wednesdays #02 - Customising Rich Text Features in Wagtail](https://www.youtube.com/watch?v=ei7ot_Wry3o) –  In this weeks video Catherine talks you through the steps you can take to customise your rich text editors to control which features are available to your content editors.
+- [Draftail extensions – custom entities tutorial](https://www.youtube.com/watch?v=nCMgoTerEb4) - Step-by-step tutorial to make extensions for Draftail.
+- [Wagtail Wednesdays #01 - Adding Help Text to Improve Wagtail Editor Experience](https://www.youtube.com/watch?v=ciYNMcv3lE0) - Catherine talks you through the steps you can take to add some useful supplementary text fields to the Wagtail admin.
+- [Wagtail Wednesdays #02 - Customising Rich Text Features in Wagtail](https://www.youtube.com/watch?v=ei7ot_Wry3o) - Catherine talks you through the steps you can take to customise your rich text editors to control which features are available to your content editors.
+- [Wagtail Wednesdays #03 - Using tabs to create a cleaner admin interface](https://www.youtube.com/watch?v=uZc0aZrHtQw) - Chris talks you through using tabs to organise fields.
+- [Wagtail Wednesdays #04 - Organising Images and Documents using Wagtail Collections](https://www.youtube.com/watch?v=HGXHtFpLDCA) - Kieran talks you through the process of organising your images and documents into collections.
+- [Wagtail Wednesdays #05 - How to organise your fields and streamline the editor experience](https://www.youtube.com/watch?v=CedcZmQ9KHs) - Chelsea talks you through the process of organising your fields to make it easier to manage them and streamline the editor experience.
+- [Wagtail Wednesdays #06 - Creating & using custom settings in your wagtail site](https://www.youtube.com/watch?v=KJWCGq3IRNc) - Chris talks you through setting up and using custom site settings.
+- [Wagtail Wednesdays #07 - How to Enable the Wagtail Styleguide](https://www.youtube.com/watch?v=_CfU9UivYPI) - It’s a really helpful resource that takes no time at all to enable and it allows you to check your components against the guidelines and shows all the available Wagtail icons.
 
 ### Showcases