[API] Need REST API to programmatically create Idea Category

We need an API to programmatically create Idea Categories since IBM has a very big idea category and we need to update this category from time to time - to sync and map with the product structures in Aha. Manually maintain this idea category is not an option for us.

I only find the GET categories API from http://www.aha.io/api/resources/idea_categories, but no POST API