Translate functions and types from the "builtin" package

[steele232]

We need to make sure all these little commands are implemented in the framework. These should clean up all the keywords that I had kind of forgotten about.

Link: https://golang.org/pkg/builtin/

[steele232]

Realized that for beginners, many builtin things will go unused and don't urgently need translations.

[steele232]

I mean, there are still a few that could use translations, but the hardest ones probably don't.

[steele232]

append -- ??
capacity -- 大小
close -- 关闭（链接）
copy -- 复制
delete -- 删除
length -- 长度
new -- 新
print -- 打印
println 打印一行
// 不用 // Type -- 类型