Adds support for persisting block metadata to disk which prevents a server restart from erasing the metadata we use when deciding which blocks GlobalWarming added during sea level rise (which means when sea levels go down, we can properly remove all the correct blocks)

Adds "chat.welcome-on-join: true" to the default config which determines if we send out the configured welcome message on player join.

• Adds three PlaceholderAPI variables. To use them please modify the config.yml and set scoreboard.enabled to false. This will register the expansion pack automatically.

1. %globalwarming_world_temp%
2. %globalwarming_world_score%
3. %globalwarming_player_score%

• Updates default reductionModel.json to include the missing spruce logs and leaves materials which prevented carbon score reductions from working for spruce trees.
• If you're updating from an older version, the changes won't be reflected because your model files were already loaded from the jar onto your filesystem. You can either delete the old models, or manually add the materials to the config.

Thank you and enjoy.

• Greatly improve efficiency of sea level change
  
• Prioritize chunks closer to players when updating sea level
  
• Fixes bug where organic blocks not getting set to water
• Fixes bug when sea levels decrease and blocks didn't get set back to air.
• Fixes issue where water flowing was improperly prevented.
• Allows custom sea level using `base-sea-level: 62` in effectModel.json

• Adds H2 support as default database.
  
• Fixes tree reduction calculation bug which caused reductions of 0 for some tree growths.
  
• Adds support for custom world sea levels, defined in effectModel.json
• Adjusts default reduction model to be more balanced (changes are just to the default model, remove it and let it regenerate to get changes)

1. If you're currently using MySQL, go into the main config.yml and add 'database.type: MySQL'. Otherwise, you will not have any of the scores.
   
2. Changes to the models aren't automatic, since we treat the files as the source of truth. If you want the changes in this update to be present, you can let the model files be regenerated when the plugin starts by deleting them after shutdown.

Improves config stability
Adds metric for demo mode usage

• Adds Methane Support
• Adds opt-in realtime carbon score updates (/gw score alerts)
• Bug Fixes

Works for 1.13 or 1.14.1 however blast furnaces and smokers are not tracked with this version.

Updated the download link so I can track the number of downloads because Jenkins doesn't support this functionality.