Protected Areas API

Creates a API to query by wdpa_id (to feed third party projects on protected-planet-consumer)

The query can be done using:

http://localhost:3000/api/protected_areas?wdpa_id=[wdpa_id]

You can check the code on

controllers/api/protected_areas.rb
models/protected_areas.rb
test/integration/api_test.rb

I was just picking the ones that may be relevant for the consumer (avoiding unnecessary data from other tables) so we can have a cleaner result. 

In the other side I am just using the attributes that I need so any change won't affect the consumer (as long as we keep the same structures and we don't remove attributes and we keep the ones coming from joined tables).

What do you suggest? getting all of them excpet geometry, including joined tables?