recoded the way of handling grenades.
Please delete your config.yml and grenades.yml and make sure none of grenades before this update are in-use.

added support to spawn ARROW/TNT instead of item
added support to change refresh rate of some things

countdown now starts once the item touch the ground/or hit liquid, not like before when thrown.
improved config comments
Particle, Sound and Model can now be changed via validator
fixed a lot of other smaller bugs


fixed some performance issues
fixed "overwrited" grenades
fixed pitch and volume
fixed chat-typing
fixed -0.1s countdown