Create recivedCategoryData Function

[Chrstjan]

In the app.js make a function called recivedCategoryData

The function should

• Check if the data is the correct format (.json format)
• if the data is as expected send the data to the buildSidebar function
• else if the data is not as expected
• send the data to the dataError Function

[Chrstjan]

Adding error catching to the function itself

[Chrstjan]

Adding the correct code to the function.

Making sub categories and adding them to sup categories