Revert "Replace master branch with page content via GitHub"

This reverts commit f2fac0e66b33939eb11615a83cb0911b4d5099c9.
Revert "Revert "Replace master branch with page content via GitHub""

This reverts commit 14167c48280199ebaa6edab0bf08cefaa468b80b.
Merge remote-tracking branch 'origin/master'