Remove mods/fantasycore/menus/menus.txt

It is exactly equal to mods/default/menus/menus.txt hence it makes no sense
to keep it.
Merge pull request #159 from stefanbeller/master

Remove file mods/fantasycore/menus/menus.txt
Added topic keyword to Martigan dialogs.
Added topics to dialogs.
Update dialogs wiht Guill with topics, also fixed the require
status to make the dialog flow nicer in the NPC action menu.