Add new python3 wrapper

[Nekidev]

I created a python3 wrapper for the API and added it to the README.md. I believe it is easier to use than the existent wrapper.

Some features this library has:

• Everything in a single class (StudioGhibliAPI).
• Dynamic loading of objects (Relations are loaded automatically only when requested).

Example of dynamic loading:

from anime_api.apis import StudioGhibliAPI

api = StudioGhibliAPI()

# This object is loaded
anime = api.get_anime(anime_id="some-uuid-id")

# List of unloaded `Person` objects
people = anime.people

# Still unloaded
person = people[0]

# Loads when the property is accessed (delay accessing because the API request is made here). 
# Can also be loaded using `person.load()`. The loaded state can be checked using 
# `person.is_loaded`
person.name

# The object was already loaded before so this won't have a delay (nor request to the API)
person.hair_color