Add a new template

[Yuansheng Lu]

I want to add a new template based on an existing template named "cool". I want to change the layout for that template. Try to create a rtl (right to left) version for the the template "cool" and name is as "cool-rtl".

[mbndr]

You can create your template in a fork of the repository and create a pull request (like #301)

[Sara Steiert]

Feel free to create a PR :)