Package VS third party VS modules

[eluser]WebMada[/eluser]
Hi!

What are the differences between package and third party?

In CI 2.0, there is a new folder "third party" but there is nothing about a package folder or module folder.

By reading this item: Package VS module, I know now that module is for HMVC which is not yet supported by CI.

I also want to know the role of the CI 2.0 new folder "core" in application folder?