add A Chinese Post about Package-Oriented-Design guidelines and Architecture layer

merge all

404 links removed, pkg directories added

Remove link to 404 not found

Make some links clickable in the readme

Integrating https://github.com/github/gitignore/blob/master/Go.gitignore

Remove unnecessary .keep files

nats new repo

Integrating https://github.com/github/gitignore/blob/master/Go.gitignore

'.keep' files where committed early on to build a directory structure. Since then other files have been added to those directories, making
them unnecessary.

Fix typo ("Go tool" -> "Go tools")

Fix typo in the word "Continuous"