Updated zh_HK locale and removed bin folder.

Added zh_HK locale; and, it is unnecessary to git about a bin folder
when the repo is usually for storing sources instead of seperated class
files; part of them is okay but having a jar file would be better
instead of folders of class files.
Touched license file.
Updated LICENSE based on BukkitDev infopage.
Merge pull request #1 from lifehome/master

Removed bin folder, added zh_HK locale, update LICENSE.