PiperOrigin-RevId: 229521919
GitOrigin-RevId: 4574e5bc99c61ac531c9ef27ca9bd408391bc6fa

Previous change only updated links within *.md files.

PiperOrigin-RevId: 197638622
GitOrigin-RevId: d8dfc70ea101688291c388503dd8b1fabfd3c496

This will align the repository with Github's guidelines:
https://help.github.com/articles/setting-guidelines-for-repository-contributors/

Also, fix a bunch of broken/inconsistent links.

PiperOrigin-RevId: 197562610
GitOrigin-RevId: 21fc894ae8c806d24eae0dd20fe67140acb31b56

Change-Id: I4c2b0462f79949c6e42d19854efa2d16e3c95dad
ORIGINAL_AUTHOR=Thai Duong <thaidn@google.com>
GitOrigin-RevId: 2a4094adf71abdc11a76e03729b035ba1513bec7