v0.6 - 26.06.2012
 *  Added some checks to avoid async race problem
 *  Negative perms are passed "as is" and with false.

v0.5 - 20.06.2012
 *  Added world flag support
 *  Added teleport listener (due to residence ignore Teleport until player move)

v0.4 - 20.06.2012
 *  Fixed user quit/login producing harmless error.

v0.3 - 18.06.2012
 *  Added flag permissions
 *  Added flags.yml

v0.2 - 14.06.2012
 *  Added sources to jar

v0.1 - 14.06.2012
 *  Initial version.