1 new script and lots of enhanced documentation

I've added a new script: sphere_hollow.py, which creates a hollow sphere (instead of the tiered one that sphere.py creates). This script also contains ideas in comments for how to modify it to do different things.

I've also included a lot more information in the README.md and SETUP_README.md compiling a bunch of the nitty gritty details I've learned about setting up and maintaining the environment. I expect these can be enhanced a lot in future. This is just a starting off point.

I included the mcpi api directory in this repository so (1) people can skip the step where they have to troubleshoot module-not-found errors and (2) we have bundled the version of the API that we expect these scripts to work with. I included a link to the actual source in the README.

I was tempted to include the server folder that we keep on the thumb drive too, but I decided against that since it won't work for all users, however we might want to include a list of the specific versions of things we're using so people can make sure they've got a compatible set of components. I've covered much of this in the new readme text, but not all of it (i.e. specific jar file versions).