code: public Category getCategory(String title) throws WikiApiException   {
          Category cat = new Category(this, title);
          return cat;
      }
docs: Gets the category for a given title.
  If the {@link Category} title start with a lowercase letter it converts it to an uppercase letter, as each Wikipedia category title starts with an uppercase letter.
  Spaces in the title are converted to underscores, as this is a convention for Wikipedia category titles.
  
  For example, the (possible) category "Famous steamboats" could be queried with
  - "Famous steamboats"
  - "Famous_steamboats"
  - "famous steamboats"
  - "famous_steamboats"
  @param title The title of the category.
  @return The category object with the given title.
  @throws WikiApiException If no category with the given title exists.