Add Beginner Box content

[Jnosh]

• Add creatures, hazards & items from the Beginner Box
• Adjust TiO bestiary to build on BB bestiary and some TiO bestiary improvements
• Add _copy mode for setting json object properties

[Jnosh]

Some Notes:

• I've named the source Beginner Box (short BB). The adventure itself is called Menace Under Otari but Beginner Box seems more appropriate since that is the name of the full product and it includes items, creatures & hazards in addition to those used in the adventure.

• The beginner box doesn't have an OGL attached so we don't have an official license entry. Nethys also doesn't have an entry for it on its Licenses page so I used the spelling Nethys uses on the source page for it: Pathfinder Beginner Box: Game Master's Guide

• I've only imported content from the Game Master's Guide which includes the adventure and some extra items, hazards & creatures for GMs to creature adventure's with.

• I've set adventure to true for the source - I think in theory one could classify this either way but adventure probably makes more sense so the content is hidden by default.