World Primer

• Add a /worldprimer reload-configs command
• Internally refactor command substitutions
• Add top block Y at a given XZ location substitution
• Add a rand substitution
• Add a TOP_Y_RAND substitution
• Add player commands for join, quit, death, respawn, enter & leave dimension
• Add an optional centered argument to the place-structure command
• Add more info about command substitutions to the config category comment
• Add real time and game tick substitutions. Expand the doc in the config.
• Remove the escape character from escaped substitutions

Original build time: 2017-11-02 19:53:15 UTC+2