Export it stationary to json

[BevapDin]

Enable items of type it_stationary to be loaded from json.

Before merging this we should speak about the names that got used here:

it_stationary (C++ class name) - it's a flyer (item not furniture). This should be changed, as should STATIONARY_ITEM (type of the json object, like GENERIC). Maybe something like NOTE, RANDOM_TEXT_ITEM, or something?

I extended the snippet loading to allow arrays instead of having each snippet in a separate entry. This can be used to create the newspaper item from the forum: http://smf.cataclysmdda.com/index.php?topic=6218.0

[KA101]

OK, I don't fully understand what's going on in this one. Should we pull the trigger or not?

[BevapDin]

It is working as fine. Only the names bothered me: STATIONARY_ITEM/it_stationary for things like fliers? But if nobody objects, I'm fine with it.

[KA101]

Just labelled it. If I don't hear any objections by the time I come looking again, I'll merge it--there's a newspaper-maker eagerly awaiting streamlined code.