Ghop Documentation Task

["natan yellin" <aantny gmail com>]

Hello,
I'm one of the GHOP students participating in GNOME. We're looking to add a few new tasks, and several of them are related to GDP.

In particular, I thought that the gtk tutorial could use some updating. If someone could volunteer to mentor or provide me with the necessary information (
e.g. exactly what needs to be updated), then I'd be happy to write up the task description myself.

Thanks,
Natan