Make sure ROM children have global parent.
Prep. for not using file within ROM modules.
Fix wrongly assigning value to ig.rom
Make ROM globally accessible.
Remove reliance on file from warp module.
Remove reliance on file object from ROM tile module.
Remove reliance on file, from ROM tile collection module.
Remove reliance on ig.FileSystem from function.
Don't pass file object to function.
Don't pass file object to function.
Don't pass file object to function.
Remove reliance on file object, from function.
Remove reliance on file object, from class.
Don't pass file object to function which doesn't need it.
Remove ROM palette module reliance on file argument.
Don't pass argument to class which doesn't need it.
Reduce direct reliance on ig.FileSystem.
Don't pass argument to function that doesn't need it.
Don't pass argument to function that doesn't need it.
Don't define variable that will not be used.