* Added README in Portuguese to the project and also added link in the other existing README.
* Reversed change by mistake in the English README
* Change README in Portuguese to maintain consistency when changing languages.
This revision is more or less an overhaul to the first one, I've kept one view in the end, viz: to make it as clear as possible.
Marginal notations on translation (in Chinese):
请保持术语一致；不要滥用介词。
术语一览：
Guidance Computer - 制导计算机
Original Source Code - 原始代码
Digitized - 电子化 （代码从纸质材料转为电子形式，电子化更贴切）
Repo - 仓库
Source Code - 源代码
PR - （无正式译名，未译出）
Public Domain - 公共领域
INSTRUMENTATION LABORATORY - （无正式译名，未译出）
MASS - （无正式译名，未译出）
Mod - （无正式译名，未译出）
Gaboso