Revert "Revert "Revert "Create gh-pages branch via GitHub"""

This reverts commit 9924f773f34f98c3522b6ff0e8b47e8439033791.
0Revert "Revert "Create gh-pages branch via GitHub""

This reverts commit 256a1bb300ef0ca20254a2da12fc8484d3fa3323.
Revert "Revert "Fix merge error.""

This reverts commit 53ae71ecd7ad5dfbf43d5ee9a3abdc5e1e3cbcbd.
Revert "Revert "Remove submodules""

This reverts commit b757bdb33d2216018deae3071b9d24ac129d4a0f.
Revert "Remove submodules"

This reverts commit a3b4e7cbda5eaee1b5a1458ad4544eb151d46be3.
Revert "Fix merge error."

This reverts commit 160095e00a1eb926363c8c24e5c51a3049a7d99b.