Adding a new system preference : serialsadditem

Adding a new system preference : serialsadditem

Adding two functions in Biblio.pm : getitemlocation and getitemstatus (helpful to get location list and status list, status is supposed to be in relation with items.notforloan)

Adding a new function in Bull.pm : serialsitemize which take serial id and item information and creates the item
Modifying statecollection to add a new line (used for data input)