Minor bug fix, new feature

Corrected a bug in the admin script that failed to display a coherent
error message, but instead showed a numeric error code.

Also added the script AIML_Files.php, which can extract AIML content
from any Program O chatbot from version 1 to present. The script will
also work with version 3, once it's released.
Merge branch 'master' of https://github.com/Program-O/Program-O