Added Ferghus

Added Ferghus and updated scripts_npcs.txt (Don't let him out of his
cell, haha)
Updated Alissa

Fixed alissa to say the users name
Updated Ferghus

Fixed a bug where you couldn't talk to Ferghus
Changed Conversation to StartConversation

Fixed a bug where Ferghus disliked everyone and only said dialogue.
Merge pull request #38 from iAmazed/Ferghus

Added Ferghus