Save and Load a world

To save, type '!save_story' in the command prompt.

As of v0.43.1 you need to be "wizard" to save story. This is to disallow any user in MUD mode to save the story. Ref: https://github.com/neph1/LlamaTale/wiki/Be-a-Game-Master)](https://github.com/neph1/LlamaTale/wiki/Be-a-Game-Master

Currently it saves:

• Locations,
• Zones,
• NPCs,
• Items,
• Story background info.

To 'load' it the first time (sorry for the inconvenience):

• Copy the 'world_story' folder from tests/files into 'stories'
• Copy the 'world.json' and 'story_config.json' that were saved in the current (anything?) story folder.
• Update story.py to use the new config.