the __init__.lua is used if you are importing the package directory, all the examples i have seen use something similar to this:
in your main program file you load:
which is the line that will call the __init__.lua file which in turn you have all your other imports located:
so any of your other packages you want to have access to the reasources in another page you just have to import the parent directory which calls the __init__
does that clear things up for you?