AssetBundle loading in Unity5

Is there already a simple tutorial somewhere, how to load and generate AssetBundles in Unity5?

I'm missing code examples in the documentation. I have downloaded the demo files of Vincent Zhang from the forum (New AssetBundle build system in Unity 5.0), but I think this is hard to understand. He put all several ways how to handle Assetbundles together in one file and it's hard to seperate them for understanding each of them.

I'm looking for a step by step tutorial, best for 2D prefabs.

thanks in advance