PerfEnderInv - 11 features v1.0.4

IMPORTANT UPDATE:
• Fixed an duplication exploit (Ender chest and inventory changes now save immediately on every click or drag)

Bug fixes:
• Empty message keys in messages.yml no longer send blank chat lines

New features:
• Added a built-in update checker to all Perf plugins

Improvements:
• New config option: update-checker.enabled: true (enabled by default)

Bug fixes:
• /enderchest and other EC aliases from config now register reliably
• Opening your ender chest by clicking a block used the vanilla 27-slot GUI; it now uses the same custom viewer as /ec, so row limits from permissions apply there too.

Improvements:
• Config option replace-vanilla-enderchest-opening (default true) to turn off replacing the vanilla ender chest screen if you need vanilla behavior.