Fixed boss-spawning bug.

See issue: https://github.com/jorn-lampers/CRQ/issues/1

- Renamed main package from com.github.jornlampers.civilrealms.quests to
me.lettherebejorn.crq

- Serialized example-file goldenCoin.loot had to be deleted as it was
using the old package name.

- Changed plugin.yml to fit the new package name

- Single-bosses now spawn the way they should, the boss limit (max in
bossspawns.yml now also works.