Revert "Delete .gitignore"

This reverts commit 8f914929de1dc2ac0c7d585b81614c49f6e8efc5.
Revert "Delete .gitattributes"

This reverts commit 3dee8b1415a72c338af45064892420910b585dee.
Revert "Delete claves.php"

This reverts commit 94dfb6736838d78794d4ce191ed15666cae99f5d.