Revert "Replace master branch with page content via GitHub"

This reverts commit 1f5cfe20e8c68274f956b7f2fd78ba7772ee868a.
Revert "Revert "Replace master branch with page content via GitHub""

This reverts commit f6322c20baa6c00cc39fa3512a1353df61e0a56a.
Merge branch 'master' of https://github.com/LiuYadong/LiuYadong.github.io