Revert "Update _config.yml"

This reverts commit 14b5ad6ae5e0bc7cee98f65979bd9e84f242e020.
Revert "fix config"

This reverts commit 7ab0aabf4c14ada5aaef19030b5b61d521076c5b.
Revert "update config"

This reverts commit 63e552c15c9d7aafee071313209e2931d3063f31.
Revert "change src directory"

This reverts commit 4d68b1afe6b1b3370dcb3418f35ec75b3299f26c.
Revert "Update _config.yml"

This reverts commit 34b2f901586fe92f00dab2ae35c623596e716eaa.