GET /notebookCategories/{category_id}.json
tw.notebookCategories.get(category_id)
PUT /notebookCategories/{category_id}.json
tw.notebookCategories.update(category_id, body)
DELETE /notebookCategories/{category_id}.json
tw.notebookCategories.delete(category_id)
GET /notebookCategories/{category_id}/notebooks.json
tw.notebookCategories.getNotebooks(category_id, query_string)