Fixed deprecation warning for OfflinePlayer.setBanned

There is no such method called BanList.unban(String).
The Method is called BanList.pardon(String)
See https://github.com/Bukkit/Bukkit/commit/75427e084d0f2a444375324b0ef7334aa66d93be#diff-972301d60a220127554416f7171487bfR50
Merge #71

Thanks @ST-DDT for the Javadoc tool warning fix

commit 8098cedace6c67cf2f246563d1f4b4c924673f71
Author: ST-DDT
Date:   2014-02-08 12:56:41 +0100

Fixed deprecation warning for OfflinePlayer.setBanned

There is no such method called BanList.unban(String).
The Method is called BanList.pardon(String)
See https://github.com/Bukkit/Bukkit/commit/75427e084d0f2a444375324b0ef7334aa66d93be#diff-972301d60a220127554416f7171487bfR50
Fix javadoc warnings
Clean up BanEntry.java
Clean up BanList.java
Tabs are evil - Fix whitespace in Bukkit.java
Clean up OfflinePlayer.java
Clean up Server.java