Typos in docs

[rebkwok]

usage.rst:
"Now you can store and lists of Wheels with your car"
Guessing "and" should be "a" or deleted

Attribute docstring:
struct_name (str, optional): The dict key to be used when serializing this attribute. Defaults to the name the attribute's name on its host ``Model``.
Should just be "the attribute's name"?
python_type (function, optional): A function that takes the serialized value and converts it to the type that will be stored on the Model instance. This parameter is the usually used with, and is the opposite of ``serialized_type``.
"This parameter is the usually used with" - something missing here
serialized_type (function, optional): A function that takes the value stored on the Model instance and returns the value that should be stored in the serialized dict. This parameter is the usually used with, and is the opposite of ``python_type``.
"This parameter is the usually used with" - ditto

BaseModelChoice docstring:
If records contain an attribute that specify the class...
Should either be "attributes that specify" or "an attribute that specifies"

Relation doctring:
Should Params be Args as in the Attribute docstring? Doesn't look like it's formatting properly in the docs.