Don't skip UNIC test when loading from memory

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Update documentation

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Validate MOD patterns to prevent false positive

Add extra checking to filter out UNIC Tracker modules such as Guardian
Dragon ripped at MOD file length.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>