Detection of identical bkid keys

[novitae]

Some bkid are different but their key mapping is the same than others. As an example, iOS ones and Android ones are charging at each versions, but their keys are always the same (those silly Chinese chars).

• Making an updatable json that contains all the bkid available, and linking them between each others.
  When the to_python function will be called with a bkid, we will see if it is a "root" one, otherwise we will look for its "root" identical one to call. This will avoid retyping countless times the same fields aliases for same objects.