Transforms data into Party objects and back again.
We also created PartyParams to send data back to the API in a uniform way.
We organized the resulting object more than we have in the past since we can do what we want now.
Lastly, we removed characters, weapons and summons from this object. We will probably make a new Grid object and reference that here instead.
Transforms data into User objects and back again.
We added the UserParams interface to handle sending data back to the API in a uniform manner.
We also modified the User object to store the user's language and theme for simplicity's sake, since the app state wants this information today.
