What is a Scene, the SceneManager and other concepts

[haggen]

I've been fooling around here fore about 2 weeks now. I even published my very first - and beta - add-on.

I've spent some dozens hours now reading the game UI code base.

Still, I don't grasp most of the concepts here, for instance, what is a Scene ?

And I come from a web development background, so I'm not a layman at all.

I don't mean to sound ungrateful, I know and value all the effort and time put into the wiki, but I think it lacks broader introductions to how things work, and the concepts involved.

Things like:

1. Event and initialization order, for instance, does the GUI is ready when the load event is triggered ?
2. The most prominent ZO_* objects, what they're for and how can you benefit from them
2. Callbacks; I know what they're but what are some actual use cases, besides events I haven't see any asynchrony
3. Other stuff that once you discovered allowed you to write add-ons more efficiently and add more features

I'm willing to expand the wiki once I understand more of all this!

Thanks for everything so far and for everything to come!