correct path of dino mod

The path in the modinfo.json file is relative to the folder of the modinfo.json file itself, so the games searched for files in "data/mods/DinoMod/DinoMod".

Btw. one can use the debug menu to look which items/monsters the games currently knows. If the list does not contain things from the mod, the mod is not loaded.

Should fix part of http://smf.cataclysmdda.com/index.php?topic=5118.msg82409#msg82409 - this works for existing saves, too