* Add 1.9+ PvP 'Cooldown'
This commit adds a subtitle that acts as the Java cooldown. This is an optional feature disabled in the config with `show-cooldown`. This does not appear on plugins that use OldCombatMechanics.
* No need to bump up the config version; I was just tested with OldCombatMechanics
* Use simpler casting
* Use session variable of lastHitTime for theoretically better performance
* Reuse attribute value calculation from AttributeUtils
* Remove unused imports
* Revert config version update in config.yml
* Implement helper methods for sending packets, fixes an NPE when chatting before connecting to the remote server
* Change method names
* Add a space between doc comment lines
* Add debug messages
Camotoy
DoctorMacc
Luke
Ender
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Tim203
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