Add the missing old_qsort file.
Replace memcpy with memmove in replace_string().
Fix buffer underun in restore_object()
Replace sort in opc_dump with COMPARE_NUMS routine.
Enable -Wextra in DEBUG build.
Fix typo in access_to_name().
make DEBUGMALLOC_EXTENSIONS work under release build
2.27-sunyc-rc1.

Also move the documentation files to root directory.
Merge branch 'master' of github.com:sunyc/fluffos