[Shadekeep]

Another update this morning, which finally adds the ability to load saved maps. The bad news is that previous maps aren't compatible with this, as I had to significantly revise the saved file structure. But going forward I will strive to ensure that the core format remains supported. Please report any issues saving and loading new maps.

Also added a Zoom slider, which may be more intuitive than the buttons. Let me know your preferences and I will remove the Zoom buttons if the slider is best. I added a numeric indicator to it and the Outline slider, since they didn't have much in the way of feedback before.