Reference to package as "module" is confusing

[Bob Kline]

Following up on the related ​forum discussion, I propose changing

... add the name of the module that contains your models.py.

to

... add the name of the package that contains your models module.

in the ​Using models section of the documentation.

In my experience, most Python programmers are not aware that, technically speaking, a package is a special type of module. This is due principally to the fact that most of the relevant language in the Python documentation implies that the term "modules" does not include packages. In the tutorial the application package is referred to as a "package," not a "module," and there is no reason not to use the more specific term here, preventing unnecessary confusion.

I will submit a PR shortly.