parent class created for list of items in the window
data get from a list specific method
import fixed
NPCs list widget added
button in the menu to add a NPC added
additemdialog module added to factorise the add of different items types
genders saved in a list
methods to get the map species and genders
method added to add an NPC in the map
dialog added to add a NPC
menu item plugged to add a NPC in the world
good method plugged
unselectCell connected on the itemAdded signal, to keep it selected while the item is not added
Merge branch 'npc'