Edit the tutorial so that the examples run on the editor

[tkiapril]

In the current state of UniLibplanet and the tutorial, the examples do not properly mine blocks when you run the scene on the editor, rather you must Build and Run each of the iterations. This seems to be related with the lifecycle of the main Unity thread; fixing this is a design decision (whether to have Agent as a MonoBehaviour or not (#31); whether to manage the coroutines that manage the events in Agent or to have them in a separate class; or whether to call the renderers in the main thread from Agent.) However, to have the tutorials work properly before implementing either of these, we would have the tutorial edited so they would work properly at its current state.