Revert "ConcurrentHashMap is junk - lets stick to standard unless issues arise."

This reverts commit 5d1a2c59a7ff9c1c1542256d453e3e307304ee37 and closes #304
Close #300 - cleaner disconnects when server is full
Add ResourceBundle localization
Fix eclipse gitignore, I think - don't use eclipse
Use multimap in scheduler
Cleanup imports
Use faster collections for the various tab lists.
Refactor encrypt util class in preparation for forge support.
Refactor encryption to be two step like vanilla. Thanks @LexManos for pointing this out.
Synchronize on pending packet queue, add forge/no forge constructor argument to login packet, and don't send channel registers twice
Make sure we write out custom login packets
Add experimental Forge support. This may cause issues when using Vanilla clients etc, so caution is advised. Please visit GitHub to report any issues you encounter. Thanks @LexManos for providing the basis for this implementation.
Add SQLite driver for future use
Close issue #311 - exception feedback on server connector
Fix forge support - closes #312
*register channels. This fixes plugins being broke
Refactor forge support - closes #318
Return if command should not be executed to avoid exceptions and unnecessary messages to the player.
Load plugins in alphabetical-ish order.