Update Command_sys.java

Handle player online check in AsyncPlayerPreLoginEvent

Apparently, online players with the same username are kicked before PlayerLoginEvent is called. This commit moves the online player check to AsyncPlayerPreloginEvent so the default behaviour can still be modified

Fixes TotalFreedom#642

Release v4.3

Stable release v4.2

Increment version number to 4.2

Increment to version 4.1 to reflect latest changes

Moved permban list to a seperate class

Refractoring
Code cleanup

Incremented version to 4.0

List of changes:
- Switched over to UUID-based configs
- Revamped TFM_AdminList
- New banning system: TFM_BanList
- Refractoring
- Updated to CraftBukkit-1.7.8-R0.1
- Added BukkitTelnet, WorldEdit and Essentials as soft dependencies

Incremented version number to reflect latest changes

600th Commit, WOO!

Incremented version to reflect latest changes