Updated modding manual

[Endoperez]

Wow! Thank you, I was waiting for this!

Some new commande I found for monsters:

#siegebonus, #reinvigoration
Looking at numbers, these are the changes for units. Of course, Magic item modding is entirely new.

One of the things I still think is missing #descr for spells/items. Moon Blade can now easily be converted to Cold Iron Sword, except for the description and name. That is only a small minus, though, as now I can do the actual change!