move `arguments` from builtin to node

node's "top-level" execution context is not actually top-level because they run the program in a function body. This has many consequences, including introducing `arguments` into scope at the "top-level". For more info see https://github.com/joyent/node/issues/6254. In general, `arguments` is not a global variable and should not be in the builtin list.
Merge pull request #10 from michaelficarra/patch-1

move `arguments` from builtin to node