Picking up objects, dynamic camera and level one.

1. I added in the ability to pick up and drop red blocks by clicking on
them. We didn't discuss picking up and moving things around, but it
seemed like an important mechanic.
2. I added in the basis for a dynamic camera system. You can see it in
action in the level I added.
3. I added a rough draft of a potential first level. It introduces the
basics of moving, phasing and picking up stuff.