Way to generate scaffolding

[Nicholas Skinsacos]

As we move forward, many things would be nice to automate. One thing, in particular, would be the scaffolding for the initial user's project. This may realize itself by something like the following:

$ goby new MyProject

This command creates the directory MyProject with .gitignore, a simple main.rb, the directories for battle, entity, etc. (same as the Goby library), etc. We may also find other ways to utilize the executable in the future.