Refactoring networks calls CuriousEdinburgh

[jollopre]

• componentDidMount(): Move object creation (e.g. Tour) to WordPress service.
• changeSelectedTour(): Move object creations (e.g. tourPlaces( to WordPress service.
• Refactor code that prevents mutability of state.tours.
• Include new attributes for the new metadata added to WordPress Categories (e.g tourDescription, enable/disable, etc).

[jollopre]

TODO:

• Include new attributes for the new metadata added to WordPress Categories (e.g tourDescription, enable/disable, etc).
• Refactor accurate check for a successful fetch (https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch#Checking_that_the_fetch_was_successful). This is repeated at WordPress and MapBox services.

[jollopre]

TODO:

• Include new attributes for the new metadata added to WordPress Categories (e.g tourDescription, enable/disable, etc).

[gmh04]

The above TODO will not be done for this milestone.