Add adp extension (as in AOLserver Dynamic Pages) to the text/html section.
Merge remote-tracking branch 'upstream/develop' into mmext
Use AbstractFile.getNameExtension()
Also add "adp" extension to plaintext.
Get the same extension that Mismatch module uses.
safety dance
Added notification of case db schema upgrade backup
Merge pull request #437 from rcordovano/db_upgrade_backup

Added notification of case db schema upgrade backup
Merge pull request #433 from SynapticNulship/mmext

Changes to use AbstractFile.getNameExtension()